A person climbing a boulder behind a tree.
A person is tired
A person may have just started climbing and so is not yet tired.
exists e1 x1 x2 x3 x4.(a_topic(x1) & behind(e1,x4) & n_tree(x4) & Theme(e1,x3) & Actor(e1,x2) & v_climb(e1) & n_boulder(x3) & (x1 = x2) & n_person(x1))
exists s1 x1.(Theme(s1,x1) & a_tired(s1) & n_person(x1))