In this task, you're given a context, 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 context 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 context or linked information.

Q: Context: With regard to their performance on 13 April 2007 at the Wembley Arena, London Link Information: Used for music, comedy, family entertainment and sport, the 12,500-seat facility Answer: 12500

A: What is the capacity of the venue where the Sugababes performed on 13 April 2007?
****
Q: Context: After a series of co-starring film roles, Lopez had her breakthrough when she was cast in the title role of Selena (1997), a biographical film about American singer-songwriter Selena Quintanilla-Pérez Link Information: 

Selena Quintanilla-Pérez (; April 16, 1971 – March 31, 1995) Answer: 2

A: How long after her death did the movie about Selena come out?
****
Q: Context: After three terms, he went to the University of Munich as a student of the experimentalist Wilhelm Röntgen and the theoretician Arnold Sommerfeld. Link Information: Wilhelm Conrad Röntgen (; ; 27 March 1845  Answer: Wilhelm Röntgen

A:
Which of Messner's teachers at the University of Munich was older?
****