In this task, you're given a passage, further information available on a particular linked term from the statement, and an answer term. Your job is to generate a question that can use the information provided to obtain the given answer. You should use the information on both passage and link information to create the question. Note that the answer to the question should be exactly the given answer, and if the answer is none, the answer to the question shouldn't be obtainable from the passage or linked information.

[Q]: Passage: Zeta Aurigae was first recognized as a spectroscopic binary by William Hammond Wright while analyzing photographic plates taken at Lick Observatory between 1898 and 1908. This star is among those earlier described by Antonia Maury as having a composite spectrum. The first orbit was determined in 1924 by William Edmund Harper using measurements taken at Dominion Observatory, his orbital elements are very similar to the most recent determinations. Harper also noticed that the composite nature of the spectrum had disappeared on the one plate when the K type primary was nearest the sun indicating a possible eclipse. In 1932 the eclipsing binary nature of the system was confirmed by Paul Guthnick, Heribert Schneller and independently Josef Hopmann.
 Link Information: none Answer: none
[A]: What was size of the largest telescope in operation when the photographic plates of Zeta Aurigae were exposed?


[Q]: Passage: In 2009 it was announced that the feature film Testament of Youth was in development by BBC Films and Heyday Films producer David Heyman, and was to be directed by James Kent. This had the support of the Vera Brittain Estate, Brittain's daughter Shirley Williams, and Brittain's biographer Mark Bostridge who is acting as consultant. Saoirse Ronan was cast to play Brittain in 2012 but was replaced in December 2013 when it was announced that Alicia Vikander would play Vera Brittain in the film which was released in late 2014 as part of the First World War commemorations. On 4 February 2014 Kit Harington joined the cast to play the role of Brittain's fiancé Roland Leighton. On 13 February 2014, Colin Morgan, Taron Egerton, and Alexandra Roach were announced to have joined the film's cast. An ensemble cast was later confirmed as filming began, including Dominic West, Emily Watson, Joanna Scanlan, Hayley Atwell, Jonathan Bailey and Anna Chancellor. It substituted Merton College, Oxford in the scenes showing Brittain's time as a student at Somerville College, arguing that filming in Somerville itself would been too difficult in light of the new buildings constructed there since the film's time period.
 Link Information: none Answer: none
[A]: Why was Saoirse Ronan replaced by Alicia Vikander?


[Q]: Passage: In the early 1940s, he met Pearl Primus at the National Youth Administration and became her first dance partner before studying dance with Syvilla Fort and Katherine Dunham. After serving in World War II, he returned to New York in 1946 first performing on Broadway in Show Boat, and in London in Finian’s Rainbow. Later, Nash became a member of Donald McKayle’s company, another African American choreographer of New York. He became a regular in Broadway originals, performing in My Darlin' Aida, Flahooley, and Bless You All. He also danced with Alvin Ailey in 1954 when he danced in House of Flowers, choreographed by Pearl Bailey. Starting in 1948, Joseph Nash became a dance instructor at Marion Cuyjet’s Judimar School of Dance in Philadelphia. His classes became famous in the city dance scene. One of his most talented students, Judith Jamison, became a world-famous dancer, becoming the artistic director of the Alvin Ailey American Dance Theater. Arthur Hall, a dancer and archivist, was also one of his students.
 Link Information: Pearl Eileen Primus (November 29, 1919 – October 29, 1994) Answer: Katherine Dunham
[A]:
Which of his pre-World War Two dance partners was the oldest?