In this task, you're given a passage, further information available on a particular linked term from the statement, and a question. Your job is to generate the answer to the question by using the information provided. If there is no clear answer obtainable, output 'none'.

Passage: Kapp received his Abitur from Gymnasium “Hammonense”, the same educational institution where his father held the position of principal. Between 1842 and 1844, Kapp studied law and philosophy at the University of Heidelberg. There, at his uncle Christian Kapp's (1798–1874) house, he met the philosopher Ludwig Feuerbach. Not only did they become close friends; Feuerbach's criticism of religion, which also strongly influenced Karl Marx, had a great impact on Kapp's attitude towards life as well. Other acquaintances from his time as a student were Ludwig Bamberger (1823–1899), who would later become a banker, the author Berthold Auerbach (1812–1882) of Heidelberg and the poet Bettina von Arnim (1785–1859) of Berlin. From 1844 on, Kapp studied at the University of Berlin and voluntarily served in the army for one year. In Berlin, he was already working as a journalist for the utopian socialist magazine called "Westfälisches Dampfboot" ("Westfalian Steamboat").
 Link Information: the author Berthold Auerbach Question: What was one of the books written by the author Kapp knew from his time as a student?
Answer: Biography of Frederick the Great (1834–36)

Passage: Merion Estes (born Salt Lake City, Utah on September 5, 1938) is a Los Angeles-based painter. She earned a B.F.A. at the University of New Mexico, in Albuquerque, and an M.F.A. at the University of Colorado, in Boulder. Estes was raised in San Diego from the age of four. She moved to Los Angeles in 1972 and first showed her work at the Woman's Building in Los Angeles. As a founding member of Grandview 1 & 2, she was involved in the beginnings of Los Angeles feminist art organizations including Womanspace, and the feminist arts group, "Double X," along with artists Judy Chicago, Nancy Buchanan, Faith Wilding, and Nancy Youdelman. In 2014, Un-Natural, at the Los Angeles Municipal Art Gallery in Los Angeles, which included Estes' work, was named one of the best shows in a non-profit institution in the United States by the International Association of Art Critics.
 Link Information: none Question: What was the population of Salt Lake City the year that Merion Estes was born?
Answer: none

Passage: "Sandcastles in the Sand" is a song written by Craig Thomas and Carter Bays for the CBS television series How I Met Your Mother. The song was performed by Canadian actress Cobie Smulders in the role of Robin Scherbatsky, who has a secret past as a teenage Canadian pop star under the stage name Robin Sparkles. A follow-up to "Let's Go to the Mall" (2006), "Sandcastles in the Sand" was inspired by several 1980s pop ballads. The song was made available for streaming on April 15, 2008, before it appeared in an episode of the same name that aired on April 21. It was released as a single on April 23, and appeared on the soundtrack album How I Met Your Music (2012).
 Link Information: none Question: How many episodes of How I Met Your Mother did the character of the the teenage popstar appear in?

Answer: none