question: In what year did a group of computer scientists build a model for ratings produced by rating agencies that turned out to be accurate for what happened in 2006-2008 ?
answer: 2005
turker_answer: A group of computer scientists built a model for ratings produced by rating agencies that turned out to be accurate for what happened in 2006-2008 in 2005 .
rule-based: Did a group of computer scientists build a model for ratings produced by rating agencies that turned out to be accurate for what happened in 2006-2008 in 2005 .