An airplane is flying over the mountain trying to extinguish a fire.
An air tanker drops fire retardant over a forest fire.
Just because an airplane flying over a mountain trying to extinguish a fire does not mean it is a forest fire.
exists e1 e2 p1 x1 x2 x3.(n_mountain(x2) & over(e1,x2) & Topic(e2,p1) & Actor(e2,x3) & v_try(e2) & exists e3 x4.(Theme(e3,x4) & Actor(e3,x3) & v_extinguish(e3) & n_fire(x4)) & (x2 = x3) & Actor(e1,x1) & v_fly(e1) & n_airplane(x1))
exists e1 x1 x2 x3 x4 x5 x6.(over(e1,x5) & n_fire(x5) & of(x5,x6) & n_forest(x6) & Theme(e1,x3) & Actor(e1,x1) & v_drop(e1) & n_retardant(x3) & of(x3,x4) & n_fire(x4) & n_tanker(x1) & of(x1,x2) & n_air(x2))