Singers performing to the crowd.
Entertainers are singing.
Singers shows that one is singing.
exists e1 x1 x2 x3.(n_crowd(x3) & a_topic(x1) & to(e1,x3) & Actor(e1,x2) & v_perform(e1) & (x1 = x2) & n_singer(x1))
exists e1 x1.(Actor(e1,x1) & v_sing(e1) & n_entertainer(x1))