Two men are sitting working on their computers.
Men are on computers.
The men are working on their computers so they must be on computers .
exists e2 e1 x1 x2.(for(e1,e2) & on(e2,x2) & n_computer(x2) & of(x2,x1) & n_thing(x1) & Actor(e2,x1) & v_work(e2) & Actor(e1,x1) & v_sit(e1) & n_man(x1) & card_eq_2(x1))
exists p1 x1.(exists x2.(on(x1,x2) & n_computer(x2)) & n_man(x1))