Problem: Background: David Kellogg Lewis (September 28, 1941 - October 14, 2001) was an American philosopher. Lewis taught briefly at UCLA and then at Princeton from 1970 until his death. He is also closely associated with Australia, whose philosophical community he visited almost annually for more than thirty years. He made contributions in philosophy of language, philosophy of mind, philosophy of probability, metaphysics, epistemology, philosophical logic, and aesthetics.
Context: Lewis went on to publish Counterfactuals (1973), which contained an analysis of Counterfactual conditionals in terms of the theory of possible worlds. He had already proposed it in some of his earlier papers: "Counterpart Theory and Quantified Modal Logic" (1968), "Anselm and Actuality" (1970), and "Counterparts of Persons and their Bodies" (1971). In spite of significant technical advantages promised by this approach, the theory was widely considered to be too implausible to be taken literally, as Lewis urged it should be. Most often the idea that there exists an infinite number of causally isolated universes, each as real as our own but different from it in some way, and that furthermore that alluding to objects in this universe as necessary in order to explain what makes certain counterfactual statements true but not others, meets with what Lewis calls the "incredulous stare" (Lewis, OPW, 2005, pg. 135-137). Lewis defends and elaborates his theory of extreme modal realism, while insisting that there is nothing extreme about it, in On the Plurality of Worlds (1986). Lewis acknowledges that his theory is contrary to common sense, but believes that its advantages far outweigh this disadvantage, and that therefore we should not be hesitant to pay this price.  According to Lewis, what makes a counterfactual conditional of the form  "Had I made that shot our team would have won the game."  true is that there is a world, as concrete as ours and significantly similar to it, in which my counterpart makes rather than misses the shot and the counterpart of our team wins the game. Had there been a world even more similar to ours in which my counterpart makes the shot but the counterpart of our team still loses the counterfactual would have been false. When we speak of counterfactual possibilities we speak of what is the case in some possible world or worlds. According to Lewis, "actual" is merely an indexical label we give to a world when we locate ourselves in it. Things are necessarily true when they are true in all possible worlds. (Note that Lewis is not the first one to speak of possible worlds in this context. Leibniz and C.I. Lewis, for example, both speak of possible worlds as a way of thinking about possibility and necessity, and some of David Kaplan's early work is on the counterpart theory. Lewis's original suggestion was that all possible worlds are equally concrete, and the world in which we find ourselves is no more real than any other possible world.)
Question: What are counterfactuals?
Answer: Counterfactuals (1973), which contained an analysis of Counterfactual conditionals in terms of the theory of possible worlds.

Background: Mayday (Chinese: Wu Yue Tian ; pinyin: Wu Yue Tian; Peh-oe-ji: Go[?]-goeh-thin), is a Taiwanese band that was formed in the late 1990s with five members, Monster (leader, lead guitar), Ashin (vocal), Stone (rhythm guitar), Masa (bass) and Guan You (drums). Formerly So Band, they came to be known as Mayday in 1997, with the name originating from Masa's online nickname. Mayday won the Golden Melody Award for Best Musical Group in 2001, 2004, 2009 and 2012.. CNN calls them "The Chinese Beatles" and they are named "Kings of concerts" in Asia.
Context: During their hiatus, Mayday released the autobiographical documentary titled The Wings of Dream <<Yao Gun Ben Shi >> , with ticket sales hitting more than NT1.2 million in barely three days. They also released an accompanying soundtrack.  After Masa's official release from the military, the band regrouped and made a return to the music industry. To mark the event, Mayday held their City of the Sky <<Tian Kong Zhi Cheng >>  concert on 16 August 2004 at the Taipei Municipal Stadium. The concert attracted nearly 40,000 fans, which broke the record for the most concert-goers in Taiwan, a record previously held by Michael Jackson.  On 11 November 2003, the band also released their 4th studio album Time Machine <<Shi Guang Ji >> . Sales of the album hit more than 15,000 within two days, with Mayday seeing no decline in their popularity despite their hiatus. Time Machine also won Mayday their second Best Musical Group award at the 15th Golden Melody Awards.  In the summer of 2004, Mayday also participated in the making of the soundtrack for the movie Love of May, in which they also presented new arrangements of some of their old songs. Stone also had a supporting role in the movie.  5 November 2004 saw the release of their critically acclaimed 5th studio album God's Children Are All Dancing/Flying Angels With A Falling Soul <<Shen De Hai Zi Du Zai Tiao Wu >> . This album used the simultaneous recording technique to create the distinctive "band" sound of their past albums and was specially recorded at Lake Kawaguchi, Japan. In 2005, they also released a best of compilation album Just My Pride <<Zhi Zu  Zui Zhen Jie Zuo Xuan >> , which included six new songs and favourites culled from previous albums.
Question: What happened with the return to the music scene in 2004?
Answer:
To mark the event, Mayday held their City of the Sky <<Tian Kong Zhi Cheng >>  concert on 16 August 2004 at the Taipei Municipal Stadium.