A boy is attempting to climb an iron fence.
A curious boy is trying to escape from the confines of his school's playground.
A boy attempting to climb a fence isn't necessarily curious nor trying to escape.
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 p1 s1 x1 x2 x3 x4.(n_playground(x4) & of(x4,x3) & n_school(x3) & of(x3,x2) & n_male(x2) & n_confines(x2) & Topic(e1,p1) & Actor(e1,x1) & v_try(e1) & exists e2.(from(e2,x2) & of(x2,x4) & Actor(e2,x1) & v_escape(e2)) & n_boy(x1) & a_curious(s1) & Theme(s1,x1))