Some context: Friedrich Ludwig Gottlob Frege (; German: ['gotlo:p 'fre:g@]; 8 November 1848 - 26 July 1925) was a German philosopher, logician, and mathematician. He is understood by many to be the father of analytic philosophy, concentrating on the philosophy of language and mathematics. Though largely ignored during his lifetime, Giuseppe Peano (1858-1932) and Bertrand Russell (1872-1970) introduced his work to later generations of logicians and philosophers.
Frege matriculated at the University of Jena in the spring of 1869 as a citizen of the North German Confederation. In the four semesters of his studies he attended approximately twenty courses of lectures, most of them on mathematics and physics. His most important teacher was Ernst Karl Abbe (1840-1905; physicist, mathematician, and inventor). Abbe gave lectures on theory of gravity, galvanism and electrodynamics, complex analysis theory of functions of a complex variable, applications of physics, selected divisions of mechanics, and mechanics of solids. Abbe was more than a teacher to Frege: he was a trusted friend, and, as director of the optical manufacturer Carl Zeiss AG, he was in a position to advance Frege's career. After Frege's graduation, they came into closer correspondence.  His other notable university teachers were Christian Philipp Karl Snell (1806-86; subjects: use of infinitesimal analysis in geometry, analytical geometry of planes, analytical mechanics, optics, physical foundations of mechanics); Hermann Karl Julius Traugott Schaeffer (1824-1900; analytical geometry, applied physics, algebraic analysis, on the telegraph and other electronic machines); and the philosopher Kuno Fischer (1824-1907; Kantian and critical philosophy).  Starting in 1871, Frege continued his studies in Gottingen, the leading university in mathematics in German-speaking territories, where he attended the lectures of Rudolf Friedrich Alfred Clebsch (1833-72; analytical geometry), Ernst Christian Julius Schering (1824-97; function theory), Wilhelm Eduard Weber (1804-91; physical studies, applied physics), Eduard Riecke (1845-1915; theory of electricity), and Hermann Lotze (1817-81; philosophy of religion). Many of the philosophical doctrines of the mature Frege have parallels in Lotze; it has been the subject of scholarly debate whether or not there was a direct influence on Frege's views arising from his attending Lotze's lectures.  In 1873, Frege attained his doctorate under Ernst Christian Julius Schering, with a dissertation under the title of "Ueber eine geometrische Darstellung der imaginaren Gebilde in der Ebene" ("On a Geometrical Representation of Imaginary Forms in a Plane"), in which he aimed to solve such fundamental problems in geometry as the mathematical interpretation of projective geometry's infinitely distant (imaginary) points.  Frege married Margarete Katharina Sophia Anna Lieseberg (15 February 1856 - 25 June 1904) on 14 March 1887.
Who did he marry?
A: Margarete Katharina Sophia Anna Lieseberg
Some context: Tinashe Jorgensen Kachingwe (; born February 6, 1993) is an American singer-songwriter, dancer, record producer, actress, and model. She began her career as an actress and model as a child, making several film and television appearances, the most notable of which being the voice of the Hero Girl in the animated film The Polar Express (2004), Robin Wheeler on Out of Jimmy's Head (2007-2008), and Celeste on Two and a Half Men (2008-2009). In 2007, Tinashe joined the girl group The Stunners, with whom she released one extended play before they disbanded in 2011. She made her solo artist debut with two critically acclaimed mixtapes the following year,
In Case We Die, Tinashe's debut solo mixtape, was released in February 2012, recorded in her home studio. The mixtape spawned four singles, the first being promotional song, "Chainless", released to iTunes on December 19, 2011. "My High" was released for streaming on her official website. The music video for single "This Feeling" directed by Cole Walliser was released on May 1, 2012 to Global Grind. The mixtape's final single, Boss, was released August 20, 2012, after the song was featured in an episode of the VH1 series Single Ladies. The music video for the song was self-directed. The mixtape was received positively by the blogosphere.  On July 13, 2012, Tinashe announced that she had signed with RCA Records. Following the signing, her second mixtape, Reverie, was released on September 6, 2012 through her official website. The mixtape released three singles: the first "Stargazing", released on August 21, 2012; the second, "Ecstasy", released on December 18, 2012; and the final, "Who Am I Working For?", released on March 12, 2013. Upon its release, reviews for Reverie were generally positive.  From August to November 2012, a series of remixes of songs from Tinashe's two mixtapes leaked online to critical acclaim. On November 26, 2013, Tinashe released her third mixtape, Black Water. The mixtape was composed of thirteen tracks produced by Dev Hynes, Boi-1da, Ryan Hemsworth, and Tinashe herself. The single "Vulnerable", which features rapper Travis Scott, was declared a "Must-Hear Pop Song of the Week" by MTV's Buzzworthy on November 26, 2013.  Tinashe worked on her debut studio album in 2014. Recording took place in Los Angeles, London, Atlanta, New York, and Toronto. Tinashe worked with several producers, including Clams Casino, Ryan Hemsworth, Stuart Matthewman, DJ Mustard, T-Minus, Mike Will Made It, Boi-1da, Fisticuffs, Best Kept Secret, Ritz Reynolds and London on the track. On January 13, 2014, Tinashe released her first single from her debut album, "2 On". The song features American rapper Schoolboy Q, and was produced by DJ Mustard. The song entered the US Billboard Hot 100 chart at number 89, and has since peaked at number 24.  On June 29, 2014, Tinashe made her national television debut, performing her single "2 On" at the BET Awards pre-show. That same day, she also announced that her anticipated debut album, Aquarius, would be officially released on October 7, 2014. Speaking about the theme of the album, Tinashe said: "It combines the essence of all my previous work. I've stayed true to who I am. Obviously, there's some progression as I've grown as an artist, and I'm influenced by new things and what not. I think my fans will be really happy with it. I think it really embodies who I am and where I am creatively right now". The second single, "Pretend" featuring ASAP Rocky, was released on August 22, 2014. "Aquarius" debuted at number 17 on Billboard 200 with 18,000 copies sold in its first week. Tinashe also featured on Nick Jonas' "Jealous" remix.
did she write any of her solo songs?
A: