Teenagers congregate outside a brick building
Teenagers are having a club meeting.
Just because teenagers congregate it doesn't mean they are having a club meeting.
exists e1 x1 x2 x3.(outside(e1,x2) & n_building(x2) & of(x2,x3) & n_brick(x3) & Actor(e1,x1) & v_congregate(e1) & n_teenager(x1))
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & n_meeting(x2) & of(x2,x3) & n_club(x3) & n_teenager(x1))