Task: Question Generation
Input (English): Context : Petr Prajsler (born September 21, 1965 in Hradec Králové, Czechoslovakia) is a retired Czech ice hockey defenceman who played in the National Hockey League for the Los Angeles Kings between 1987 to 1990 and the Boston Bruins in 1991. 
Subject : Petr Prajsler 
Relation : drafted by
Output (English): What team is Petr Prajsler on?