Men playing volleyball in the sand.
The men are playing volleyball.
"Men playing volleyball in the sand" is a more detailed way of saying "The men are playing volleyball."
exists e1 x1 x2 x3 x4.(n_sand(x4) & a_topic(x1) & in(e1,x4) & Theme(e1,x3) & Actor(e1,x2) & v_play(e1) & n_volleyball(x3) & (x1 = x2) & n_man(x1))
exists e1 x1 x2.(n_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_volleyball(x2))