question: Between 1973 and 2015 , how amny prisoners were acquitted or received pardons or commutations of their death sentences due to possible innocence ?
answer: 156
turker_answer: Between 1973 and 2015 , 156 prisoners were acquitted or received pardons or commutations of their death sentences due to possible innocence .
rule-based: Between 1973 and 2015 , were acquitted or received pardons or commutations of their death sentences due to possible innocence 156 .