question: What is the frequency of the light to which the human eye is most sensitive ?
answer: 7014540000000000000 ♠ 540 THz
turker_answer: The frequency of the light to which the human eye is most sensitive is 7014540000000000000 ♠ 540THz .
rule-based: The frequency of the light to which the human eye is most sensitive is 7014540000000000000 ♠ 540 THz .