TASK DEFINITION: Generate a question which can yield the answer mentioned in the input. Generated question must be answered by the answer provided in input, without using any extra knowledge.
PROBLEM: Context : Mainova AG was formed in 1998 through the merger of Stadtwerke Frankfurt am Main GmbH and Maingas AG.
Answer : Stadtwerke Frankfurt

SOLUTION: What is Mainova's parent company?

PROBLEM: Context : Fire on the Water is the second installment in the award-winning Lone Wolf book series created by Joe Dever.
Answer : Lone Wolf

SOLUTION: The Fire on the Water has what character?

PROBLEM: Context : Maud de Badlesmere, Countess of Oxford (1310 -- May 1366) was an English noblewoman, and the wife of John de Vere, 7th Earl of Oxford.
Answer : John de Vere, 7th Earl of Oxford

SOLUTION:
What is Maud de Badlesmere, Countess of Oxford's spouse's name?