Girls in black bikinis playing beach volleyball.
The girls are eating hamburgers.
One can not be eating hamburgers and playing volleyball simultaneously.
exists e1 s1 s2 x1 x2 x3 x4.(ne_nam_girls(s1) & a_topic(s1) & in(s1,x1) & Theme(e1,x3) & Actor(e1,x2) & v_play(e1) & n_volleyball(x3) & of(x3,x4) & n_beach(x4) & (x1 = x2) & n_bikini(x1) & a_black(s2) & Theme(s2,x1))
exists e1 x1 x2.(n_girl(x1) & Theme(e1,x2) & Actor(e1,x1) & v_eat(e1) & n_hamburger(x2))