a hiker in a yellow shirt stands on the trail.
The hiker is lost.
We don't know that the hiker is lost.
exists e1 s1 x1 x2 x3.(n_trail(x3) & on(e1,x3) & Actor(e1,x1) & v_stand(e1) & in(x1,x2) & n_shirt(x2) & a_yellow(s1) & Theme(s1,x2) & n_hiker(x1))
exists e1 x1.(n_hiker(x1) & Theme(e1,x1) & v_lose(e1))