question: What were Darwin 's two important aims about evolution ?
answer: to show that species had not been separately created , and to show that natural selection had been the chief agent of change
turker_answer: Darwin 's two important aims about evolution were to show that species had not been separately created , and to show that natural selection had been the chief agent of change .
rule-based: Darwin 's two important aims about evolution were to show that species had not been separately created , and to show that natural selection had been the chief agent of change .