You will be given a context, a subject and a relation. Your task is to generate a question based on the subject and relation. The generated question should include the given subject. Try to use a minimum number of words that are not present in either context, subject or relation while generating question.

Context : The 1972 Thandwe crash occurred on 16 August 1972 near Thandwe, Burma. 
Subject : 1972 Thandwe crash 
Relation : point in time
On what date did 1972 Thandwe crash occur?

Context : Most TokuMX source files are made available under the terms of the GNU Affero General Public License (AGPL). 
Subject : TokuMX 
Relation : based on
The TokuMX is based upon what?

Context : Today, Evian is owned by Danone, a French multinational corporation. 
Subject : Evian 
Relation : parent company

What is Evian's parent company?