question: Who pursues Gustave and Moustafa as they try to prove Gustave 's innocence ?
answer: A cold-blooded assassin working for Dmitri
turker_answer: A cold-blooded assassin working for Dmitri pursues Gustave and Moustafa as they try to prove Gustave 's innocence .
rule-based: A cold-blooded assassin working for Dmitri pursues Gustave and Moustafa as they try to prove Gustave 's innocence .