A man rock climbing.
A man is relaxing under a tree.
The man cannot be rock climbing and relaxing under a tree at the same time.
exists e1 x1 x2 x3.(a_topic(x1) & Actor(e1,x3) & v_climb(e1) & (x1 = x3) & n_rock(x1) & of(x1,x2) & n_man(x2))
exists e1 x1 x2.(under(e1,x2) & n_tree(x2) & Actor(e1,x1) & v_relax(e1) & n_man(x1))