question: Although heartwood and sapwood might be similar mechanically , if their colors are very different , what other type of difference would they have ?
answer: chemical
turker_answer: Although heartwood and sapwood might be similar mechanically , if their colors are very different , they would be chemically different .
rule-based: Although heartwood and sapwood might be similar mechanically , if their colors are very different , chemical other type of difference would they have .