question: What do Rice and his colleagues discover in the city hall ?
answer: Evidence pointing to a cell-phone-activated suitcase bomb in the room directly below the meeting .
turker_answer: Rice and his colleagues discovered evidence pointing to a cell-phone-activated suitcase bomb in the room directly below the meeting in city hall .
rule-based: Rice and his colleagues discover evidence pointing to a cell-phone-activated suitcase bomb in the room directly below the meeting in the city hall .