A group of fans gather for some type of event.
Some people are at an event.
Fans are people.
exists e1 x1 x2 x3 x4.(for(e1,x3) & of(x3,x4) & n_event(x4) & n_type(x3) & Actor(e1,x1) & v_gather(e1) & of(x1,x2) & n_fan(x2) & n_group(x1))
exists p1 x1.(exists x2.(at(x1,x2) & n_event(x2)) & n_people(x1))