A young woman is jumping by a child's lawn chair.
a young woman is by a chair
If she is jumping by a lawn chair, she must be by the chair.
exists e1 s1 x1 x2 x3 x4.(by(e1,x3) & n_chair(x3) & of(x3,x4) & n_lawn(x4) & of(x3,x2) & n_child(x2) & Actor(e1,x1) & v_jump(e1) & n_woman(x1) & a_young(s1) & Theme(s1,x1))
exists p1 s1 x1.(exists x2.(by(x1,x2) & n_chair(x2)) & n_woman(x1) & a_young(s1) & Theme(s1,x1))