question: From 1990 to 2010 what was improvement in piped water supply to urban areas ?
answer: 89 % to 100 %
turker_answer: From 1990 to 2010 , the improvement in piped water supply to urban areas was from 89 % to 100 % .
rule-based: From 1990 to 2010 improvement in piped water supply to urban areas was 89 % to 100 % .