Men are playing with a volleyball in a pool.
Men are swimming laps in a pool.
One can not play volleyball  while swimming laps.
exists e1 x1 x2 x3.(in(e1,x3) & n_pool(x3) & with(e1,x2) & n_volleyball(x2) & Actor(e1,x1) & v_play(e1) & n_man(x1))
exists e1 x1 x2 x3.(in(e1,x3) & n_pool(x3) & Theme(e1,x2) & Actor(e1,x1) & v_swim(e1) & n_lap(x2) & n_man(x1))