Crowd of people enjoy a concert.
A gathering of people enjoy a concert.
A gathering is a synonym for a crowd.
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_enjoy(e1) & n_concert(x3) & of(x1,x2) & n_people(x2) & n_gathering(x1))