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.

Context : Mainova AG was formed in 1998 through the merger of Stadtwerke Frankfurt am Main GmbH and Maingas AG. 
Answer : Stadtwerke Frankfurt
What is Mainova's parent company?

Context : Fire on the Water is the second installment in the award-winning Lone Wolf book series created by Joe Dever. 
Answer : Lone Wolf
The Fire on the Water has what character?

Context : Satanikhil massacre refers to the massacre of Bengali Hindu intellectuals on 14 May 1971 on the banks of Satanikhil canal in Dhaka district by the Pakistan armed forces. 
Answer : 14 May 1971

What date is associated with Satanikhil massacre?