question: When must the trust resources be spent
answer: spend all of -LSB- the Trust 's -RSB- resources within 20 years after Bill 's and Melinda 's deaths
turker_answer: Spend all of -LSB- the Trust 's -RSB- resources within 20 years after Bill 's and Melinda 's deaths .
rule-based: The trust resources must be spent in spend all of -LSB- the Trust 's -RSB- resources within 20 years after Bill 's and Melinda 's deaths