A group of formally dressed people are laughing.
The people are telling a joke.
People often laugh without anyone telling a joke.
exists e2 e1 x1 x2.(Actor(e2,x1) & v_laugh(e2) & of(x1,x2) & n_people(x2) & Theme(e1,x2) & v_dress(e1) & r_formally(x2) & n_group(x1))
exists e1 x1 x2.(n_people(x1) & Theme(e1,x2) & Actor(e1,x1) & v_tell(e1) & n_joke(x2))