A collie jumps a hurdle
The collie is escaping.
Just because the collie jumps a hurdle doesn't mean he is escaping.
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_jump(e1) & n_hurdle(x2) & n_collie(x1))
exists e1 x1.(n_collie(x1) & Actor(e1,x1) & v_escape(e1))