A boy in jeans runs on a track.
A boy wearing shorts is jumping over the hurdles.
Jeans is pant and not shorts.  Run on the tracks is different then jumping over the hurdles.
exists e1 x1 x2 x3.(on(e1,x3) & n_track(x3) & Actor(e1,x1) & v_run(e1) & in(x1,x2) & n_jeans(x2) & n_boy(x1))
exists e2 e1 x1 x2 x3 x4.(n_hurdle(x4) & over(e2,x4) & Actor(e2,x1) & v_jump(e2) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & n_shorts(x3) & (x1 = x2) & n_boy(x1))