Four men (2 observing) with helmets are digging in the ground.
Four men are wearing helmets.
With helmets means the same as wearing helmets.
exists e1 x1 x2 x3 x4.(n_ground(x4) & in(e1,x4) & Actor(e1,x1) & v_dig(e1) & with(x1,x3) & n_helmet(x3) & rel(x1,x2) & n_observe(x2) & n_date(x2) & a_date_day_02(x2) & a_date_day_02(x2) & n_man(x1) & card_eq_4(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & n_helmet(x2) & n_man(x1) & card_eq_4(x1))