question: By 2011 , how many people were affected by asthma ?
answer: 235 -- 330 million people worldwide are affected by asthma
turker_answer: By 2011 , 235 -- 330 million people worldwide were affected by asthma .
rule-based: By 2011 , 235 -- 330 million people worldwide are affected by asthma were affected by asthma .