A person on their knees looking for something.
A person standing in a room.
If a person is on their knees they are not standing.
exists e1 x1 x2 x3 x4.(a_topic(x1) & on(x1,x2) & for(e1,x4) & n_thing(x4) & Actor(e1,x3) & v_look(e1) & (x2 = x3) & n_knee(x2) & of(x2,x1) & n_thing(x1) & n_person(x1))
exists x1 x2 x3.(a_topic(x1) & in(x1,x3) & n_room(x3) & n_standing(x1) & of(x1,x2) & n_person(x2))