Girls are playing volleyball.
Girls are playing volleyball and basketball.
the girls can't play volleyball and basketball at the same time
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_volleyball(x2) & n_girl(x1))
exists e1 x1 x2 x3 x4.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_basketball(x4) & n_volleyball(x3) & subset_of(x4,x2) & subset_of(x3,x2) & n_girl(x1))