question: What does the word `` races '' mean as referenced in Darwin 's book ?
answer: an alternative for `` varieties '' and does not carry the modern connotation of human races
turker_answer: The word `` races '' , as referenced in Darwin 's book , is an alternative for `` varieties '' and does not carry the modern connotation of human races .
rule-based: The word `` races '' means an alternative for `` varieties '' and does not carry the modern connotation of human races as referenced in Darwin 's book .