Two people playing with a volleyball in a pool.
Two sisters are in a pool playing volleyball.
Not all Two people playing with a volleyball in a pool are sisters.
exists e1 x1 x2 x3 x4.(a_topic(x1) & in(e1,x4) & n_pool(x4) & with(e1,x3) & n_volleyball(x3) & Actor(e1,x2) & v_play(e1) & (x1 = x2) & n_people(x1) & card_eq_2(x1))
exists p1 x1.(exists e1 x2 x3 x4.(in(x1,x2) & Theme(e1,x4) & Actor(e1,x3) & v_play(e1) & n_volleyball(x4) & (x2 = x3) & n_pool(x2)) & n_sister(x1) & card_eq_2(x1))