Four girls on a beach are playing catch.
A group of girls are passing a ball around on the beach.
Four girls equals a group
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_play(e1) & n_catch(x3) & on(x1,x2) & n_beach(x2) & n_girl(x1) & card_eq_4(x1))
exists e1 x1 x2 x3 x4.(n_beach(x4) & r_around(e1) & on(e1,x4) & Theme(e1,x3) & Actor(e1,x1) & v_pass(e1) & n_ball(x3) & of(x1,x2) & n_girl(x2) & n_group(x1))