A boy is attempting to climb an iron fence.
The boy is walking through a door.
One cannot be climbing and walking at the same time. A door is different than an iron fence.
exists e1 p1 x1.(Topic(e1,p1) & Actor(e1,x1) & v_attempt(e1) & exists e2 x2 x3.(Theme(e2,x2) & Actor(e2,x1) & v_climb(e2) & n_fence(x2) & of(x2,x3) & n_iron(x3)) & n_boy(x1))
exists e1 x1 x2.(n_boy(x1) & through(e1,x2) & n_door(x2) & Actor(e1,x1) & v_walk(e1))