Crowd of people enjoy a concert.
Crowd of people attend a concert.
just because a crowd of people are  enjoying a concert doesn't mean the Crowd of people attend a concert.
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_enjoy(e1) & n_concert(x3) & of(x1,x2) & n_people(x2) & n_crowd(x1))
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_attend(e1) & n_concert(x3) & of(x1,x2) & n_people(x2) & n_crowd(x1))