question: What caused Oklahoma 's temperature to plummet 66 degrees on Nov 11 , 1911 ?
answer: an Arctic cold front
turker_answer: An Arctic cold front caused Oklahoma 's temperature to plummet 66 degrees on Nov 11 , 1911 .
rule-based: An Arctic cold front caused Oklahoma 's temperature to plummet 66 degrees on Nov 11 , 1911 .