A man walks on a low tightrope under a tree.
A performer is using a tightrope.
The man may not be a performer.
exists e1 s1 x1 x2 x3.(under(e1,x3) & n_tree(x3) & on(e1,x2) & n_tightrope(x2) & a_low(s1) & Theme(s1,x2) & Actor(e1,x1) & v_walk(e1) & n_man(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_use(e1) & n_tightrope(x2) & n_performer(x1))