question: From 1990 to 2010 what was improvement in piped water supply to rural areas ?
answer: 39 % to 93 %
turker_answer: From 1990 to 2010 , the improvement in piped water supply to rural areas was 39 % to 93 % .
rule-based: From 1990 to 2010 improvement in piped water supply to rural areas was 39 % to 93 % .