Three men sit on top of a green tank.
The three men are sitting.
The men are sitting because they sit on top of a tank.
exists e1 s1 x1 x2 x3.(on(e1,x2) & of(x2,x3) & n_tank(x3) & a_green(s1) & Theme(s1,x3) & n_top(x2) & Actor(e1,x1) & v_sit(e1) & n_man(x1) & card_eq_3(x1))
exists e1 x1.(n_man(x1) & card_eq_3(x1) & Actor(e1,x1) & v_sit(e1))