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.

Ex Input:
Context : Mainova AG was formed in 1998 through the merger of Stadtwerke Frankfurt am Main GmbH and Maingas AG. 
Answer : Stadtwerke Frankfurt

Ex Output:
What is Mainova's parent company?


Ex Input:
Context : ISO 3166-2:MW is the entry for Malawi in ISO 3166-2, part of the ISO 3166 standard published by the International Organization for Standardization (ISO), which defines codes for the names of the principal subdivisions (e.g., provinces or states) of all countries coded in ISO 3166-1. 
Answer : International Organization for Standardization

Ex Output:
Who set the standards for ISO 3166-2:MW?


Ex Input:
Context : On 1 January 2015, Frênes and six other communes merged becoming one commune called Tinchebray-Bocage. 
Answer : Tinchebray-Bocage

Ex Output:

Which replaced the Frênes?