TASK DEFINITION: Generate a correct and concise answer for the question based on the words in the context.
PROBLEM: Context : Sigmund Selberg (11 August 1910 -- 20 April 1994) was a Norwegian mathematician. 
Question : What was Sigmund Selberg's occupation?

SOLUTION: mathematician

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

SOLUTION: Nikolai Ekk

PROBLEM: Context : Mihai Balan is married to Ludmila Balan and has two children: 
Question : What is Mihai Balan's spouse's name?

SOLUTION:
Ludmila Balan