question: When were millions of people supposedly exposed to e. coli and an anthrax-like bacteria ?
answer: between 1961 and 1968
turker_answer: Millions of people were supposedly exposed to e. coli and an anthrax-like bacteria between 1961 and 1968 .
rule-based: Millions of people were supposedly exposed to e. coli and an anthrax-like bacteria between 1961 and 1968 .