question: What was presented at the ELEXCON fair in 2009 ?
answer: a BeiDou terminal priced at CN ¥ 3,000 RMB
turker_answer: A BeiDou terminal priced at CN ¥ 3,000 RMB was presented at the ELEXCON fair in 2009 .
rule-based: A BeiDou terminal priced at CN ¥ 3,000 RMB was presented at the ELEXCON fair in 2009 .