question: What were William Thomson 's reasons for disputing Darwin 's estimate ?
answer: calculated that it had cooled in less than 100 million years
turker_answer: William Thomson 's reasons for disputing Darwin 's estimate were that he calculated that it had cooled in less than 100 million years .
rule-based: William Thomson 's reasons for disputing Darwin 's estimate were calculated that it had cooled in less than 100 million years .