question: What did Sun Jiadong have to say about the BeiDou navigation system ?
answer: `` Many organizations have been using our system for a while , and they like it very much . ''
turker_answer: Sun Jiadong said `` Many organizations have been using our system for a while , and they like it very much . '' about the BeiDou navigation system .
rule-based: Sun Jiadong had to say `` Many organizations have been using our system for a while , and they like it very much . about the BeiDou navigation system .