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 : The Kensington Canal was a canal, about two miles long, opened in 1828 in London from the River Thames at Chelsea, along the line of Counter's Creek, to a basin near Warwick Road in Kensington. 
Answer : 1828
What was the date of the opening of Kensington Canal?

Context : Joyce Vanderbeken (born 26 August 1984) is a Belgian female cyclo-cross cyclist. 
Answer : cyclo-cross cyclist

What kind of  occupation does Joyce Vanderbeken have?