Three men work on a piece of equipment.
the men are working together
work on a piece of equipment  is a synonym of together
exists e1 x1 x2 x3.(on(e1,x2) & of(x2,x3) & n_equipment(x3) & n_piece(x2) & Actor(e1,x1) & v_work(e1) & n_man(x1) & card_eq_3(x1))
exists e1 s1 x1.(n_man(x1) & a_together(s1) & Manner(e1,s1) & Actor(e1,x1) & v_work(e1))