Three firemen are conversing next to a firetruck.
Three firemen are conversing after extinguishing a fire.
Just because firemen are next to a firetruck does not mean they are extinguishing a fire.
exists e1 x1 x2.(to(e1,x2) & n_firetruck(x2) & r_next(e1) & Actor(e1,x1) & v_converse(e1) & n_fireman(x1) & card_eq_3(x1))
exists e2 e1 x1 x2.(after(e1,e2) & Theme(e2,x2) & Actor(e2,x1) & v_extinguish(e2) & n_fire(x2) & Actor(e1,x1) & v_converse(e1) & n_fireman(x1) & card_eq_3(x1))