Generate a correct and concise answer for the question based on the words in the context.

Ex Input:
Context : Casey's Shadow is a 1978 drama Metrocolor film directed by Martin Ritt and starring Walter Matthau. 
Question : Who are the cast members of Casey's Shadow?

Ex Output:
Walter Matthau


Ex Input:
Context : Daniela Schadt (born 3 January 1960 in Hanau, West Germany) is a German journalist, and, since 2000, the domestic partner of Joachim Gauck, the President of Germany, who has been legally married since 1959 to Gerhild Radtke. 
Question : What is Daniela Schadt's spouse's name?

Ex Output:
Joachim Gauck


Ex Input:
Context : Valentina Ivashova was married to Soviet film director Nikolai Ekk. 
Question : What is Valentina Ivashova's spouse's name?

Ex Output:

Nikolai Ekk