Some men are playing ball on the beach.
Men play volleyball on the beach.
One cannot infer that the men are playing volleyball.
exists e1 x1 x2 x3.(n_beach(x3) & on(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_ball(x2) & n_man(x1))
exists x1 x2 x3 x4.(n_beach(x4) & a_topic(x1) & on(x1,x4) & Time(x1,x3) & n_volleyball(x3) & n_play(x1) & of(x1,x2) & n_man(x2))