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 : Karl-Heinz Ertel (26 November 1919 -- 25 January 1993) was a SS-Hauptsturmführer of the Reserves, in the Waffen-SS during World War II who was awarded the Knight's Cross of the Iron Cross, to recognize extreme battlefield bravery or successful military leadership by Nazi Germany during World War II. 
Subject : Karl-Heinz Ertel 
Relation : award received
Which award was bestowed upon Karl-Heinz Ertel?

Context : Lojban has been shown to be translated in some of its parts into predicate logic. 
Subject : Lojban 
Relation : based on
The Lojban is based upon what?

Context : Force of the Imperial Master, saw the three rapping and DJing, switching off names and performing local shows; since they lived in different boroughs, GZA and Ol' Dirty would travel from Brooklyn out to Staten Island to meet up with their cousin RZA, after which the three would travel across New York City and challenge other MCs to battles. 
Subject : GZA 
Relation : occupation

What was GZA's career?