question: In the 1990 's , what is something Houston did to try to diversify it 's economy ?
answer: reduced its dependence on the petroleum industry
turker_answer: In the 1990 's Houston reduced its dependency on the petroleum industry in order try to diversify its economy .
rule-based: In the 1990 's , something Houston did to try to diversify it 's economy is reduced its dependence on the petroleum industry .