Two firemen turning the water on in the hoses.
Two firemen need both hoses to douse the flames.
There is nothing to indicate that the firemen need both hoses.
exists e1 s1 x1 x2 x3.(n_hose(x3) & n_water(x2) & in(e1,x3) & a_on(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_turn(e1) & n_fireman(x1) & card_eq_2(x1))
exists e1 p1 x1 x2 x3 x4.(n_flame(x4) & n_hose(x3) & Topic(e1,p1) & exists e2.(Theme(e2,x4) & Actor(e2,x1) & v_douse(e2)) & Theme(e1,x3) & Actor(e1,x2) & v_need(e1) & n_fireman(x2) & card_eq_2(x2) & n_fireman(x1) & card_eq_2(x1))