premise: A group of people gathered to watch fireworks.
hypothesis: There are some guys setting of fireworks.
explanation_1: Rather than guys setting them off, soemtimes only one person will light and set off fireworks, or in a bigger display they're in a timer by a computer.
explanation_2: The group of people can consist of people other than guys. Just because the people are gathering to watch fireworks, that does not mean that they are setting the fireworks off.
explanation_3: Watching fireworks doesn't imply also setting fireworks.
premise_logic: exists e1 p1 x1 x2.(Topic(e1,p1) & Actor(e1,x1) & v_gather(e1) & exists e2 x3.(Theme(e2,x3) & Actor(e2,x1) & v_watch(e2) & n_firework(x3)) & of(x1,x2) & n_people(x2) & n_group(x1))
hypothesis_logic: exists p1 x1 e1 x2 x3 x4.((x1 = x2) & of(e1,x4) & n_firework(x4) & Actor(e1,x3) & v_set(e1) & (x2 = x3) & n_guy(x2))