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.

Q: Context : Vueling was established in February 2004 and commenced operations on 1 July 2004 with a flight between Barcelona and Ibiza. 
Subject : Vueling 
Relation : parent company

A: What company is Vueling part of?
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Q: Context : Anna Hedvig Büll (born Anna Hedwig Bühl, 4 February (O.S. 23 January) 1887 -- 3 October 1981) was an Estonian missionary of Baltic German extraction who helped to save the lives of several thousand Armenian orphans during the Armenian Genocide. 
Subject : Anna Hedvig Büll 
Relation : sex or gender

A: Which sex or gender can Anna Hedvig Büll be described as?
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Q: Context : Burroughs began work on A Princess of Mars in the summer of 1911 when he was 35. 
Subject : A Princess of Mars 
Relation : series

A:
What is the series that A Princess of Mars is a part of?
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