Background: Porcupine Tree were an English rock band formed by musician Steven Wilson in 1987. The band began essentially as a solo project for Wilson, who created all of the band's music. By late 1993, however, he wanted to work in a band environment, bringing on frequent collaborators Richard Barbieri as keyboardist, Colin Edwin as bassist, and Chris Maitland as drummer to form the first permanent lineup. With Wilson as lead vocalist and guitarist, this remained the lineup until February 2002, when Maitland left the band and Gavin Harrison was recruited to replace him.
Context: Along with the A Psychedelic Psauna compilation, which featured the Porcupine Tree track "Linton Samuel Dawson", the newly formed Delerium label, formed by Freakbeat editors Richard Allen and Ivor Trueman, offered to reissue the cassettes Tarquin's Seaweed Farm and The Nostalgia Factory. Two hundred copies of each cassette were sold through Freakbeat's mail order, The Freak Emporium, and soon Porcupine Tree became known as a mysterious new act amongst the then UK underground psychedelic music scene.  Shortly thereafter, Delerium invited Wilson to sign with as one of the label's founder artists. The first release after this, a double vinyl album and single CD compiling the best material from his two cassettes, was released in mid-1992 as On the Sunday of Life, a title chosen from a long list of possible nonsense titles compiled by Richard Allen. The rest of the music from the initial tapes was released on the limited edition compilation album Yellow Hedgerow Dreamscape.  In 1992, Delerium released On the Sunday of Life as an edition of 1,000 copies, complete with a deluxe gatefold sleeve. The album sold very well, particularly in Italy, and it was briefly repressed on vinyl and has remained in print on CD ever since its release. The album featured future concert favourite and frequent encore song "Radioactive Toy". By 2000, On the Sunday of Life... had accumulated sales of more than 20,000 copies. On the Sunday of Life was originally meant to be a quadruple (LP)/double (CD) album compiling both cassettes in full, but changed to the best (according to Wilson) songs from the tapes. In 2004, Wilson remixed and remastered all three tapes, releasing them as a three-CD box set called Footprints: Cassette Music 1988-1992. This box was only distributed to family and friends.
Question: Is it collectable?
Answer: three-CD box set called Footprints: Cassette Music 1988-1992. This box was only distributed to family and friends.

Background: Melanie Jayne Chisholm was born in Whiston, Lancashire, as the only child in the family. She later moved to Widnes, Cheshire, at a young age. Her parents married on 12 January 1971 and separated in 1978, when young Chisholm was four-and-a-half years old. Her father, Alan Chisholm, worked as a fitter at the Otis Elevator Company.
Context: Chisholm's music is generally pop and rock. She also released an album of show tunes.  Chisholm has received co-writing credits for most of the songs recorded with Spice Girls and her solo efforts. The main concept of the Spice Girl albums centred on the idea of Girl Power, embodying a feminist image, as both Madonna and Bananarama had employed before, and every track deals with different aspects of this notion. Other central themes in the writing of the group were the union, solidarity, friendship, independence, love, loss of virginity, sex, contraception, the relationship with parents during adolescence, vulnerability and fame. Many of these themes were carried out even during her solo career, but with a more mature writing, intense style and in some songs a more raw and direct language. Added to these were social issues such as homelessness, and introspective themes. Having co-written 11 UK number 1s, more than any other female artist, she remains the only female performer to top the charts as a solo artist, as part of a duo, quartet and quintet. With 12 UK Number 1 singles, including the charity single as part of the Justice Collective, she is the second female artist - and the first British female artist - with the most singles at number 1 in the UK, and with a total of 14 songs that have risen to number 1 in Britain (including the double A-sides), Chisolm is the first artist with most number 1 songs in the UK ranking history.  On 1 January 2004, Virgin Records dismissed Chisholm after the conflict in previous years about the direction in her solo career. In April 2004, she founded her own label, Red Girl Records, to record and release her own projects. All of Chisolm's activities are decided upon and funded by herself, alongside her business partner and manager, Nancy Phillips. The name was inspired by the colours of the football Liverpool F.C., which Chisholm is supporter.
Question: did she play any instruments?
Answer: 

Background: Roberto Mangabeira Unger (; born 24 March 1947) is a philosopher and politician. He has developed his views and positions across many fields, including social, political, and economic theory. In legal theory, he is best known by his work in the 1970s and 80s while at Harvard Law School as part of the Critical Legal Studies movement, which is held to have helped disrupt the methodological consensus in American law schools. His political activity helped the transition to democracy in Brazil in the aftermath of the military regime, and culminated with his appointment as Brazil's Minister of Strategic Affairs in 2007 and again in 2015.
Context: Unger's critique of economics begins with the identification of a key moment in economic history, when the analysis of production and exchange turned away from social theory and engaged in a quest for scientific objectivity. In Unger's analysis, classical economics focused on the causal relations among social activities, which were connected with the production and distribution of wealth. Classical economists asked questions about the true basis of value, activities that contributed to national wealth, systems of rights, or about the forms of government under which people grow rich. In the late-nineteenth century, in response to attacks from socialist ideas and debates about how society works, and as a means to escape the conundrums of value theory and to answer how values could become prices, marginalist economics arose. This movement in economics disengaged economics from prescriptive and normative commitments to withdraw the study of economies from debates about how society worked and what kind of society we wanted to live in. For Unger, this moment in the history of economics robbed it of any analytical or practical value.  Unger's critique of Marginalism begins with Walras' equilibrium theory, which attempted to achieve a certainty of economic analysis by putting aside normative controversies of social organization. Unger finds three weaknesses that crippled the theory: foremost, the theory claimed that equilibrium would be spontaneously generated in a market economy. In reality, a self-adjusting equilibrium fails to occur. Second, the theory puts forth a determinate image of the market. Historically, however, the market has been shown to be indeterminate with different market arrangements. Third, the polemical use of efficiency fails to account for the differences of distribution among individuals, classes, and generations.  The consequences of the marginalist movement were profound for the study of economics, Unger says. The most immediate problem is that under this generalizing tendency of economics, there is no means by which to incorporate empirical evidence and thus to re-imagine the world and develop new theories and new directions. In this way, the discipline is always self-referential and theoretical. Furthermore, the lack of a normative view of the world curtails the ability to propose anything more than a policy prescription, which by definition always assumes a given context. The discipline can only rationalize the world and support a status quo. Lastly, Unger finds that this turn in economics ended up universalizing debates in macroeconomics and leaving the discipline without any historical perspective. A consequence, for example, was that Keynes' solution to a particular historical crisis was turned into a general theory when it should only be understood as a response to a particular situation.
Question: What did Unger critique about econimics
Answer:
Unger's critique of economics begins with the identification of a key moment in economic history, when the analysis of production and exchange turned away from social theory