A man wearing a mask in a cluttered room.
A man is waiting to kill the owner of the house.
Just because the man is wearing a mask it does not mean he is waiting to kill the owner of the house.
exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & in(x3,x4) & n_room(x4) & a_cluttered(s1) & Theme(s1,x4) & n_mask(x3) & (x1 = x2) & n_man(x1))
exists e1 p1 x1 x2 x3.(n_house(x3) & n_owner(x2) & Topic(e1,p1) & Actor(e1,x1) & v_wait(e1) & exists e2.(Theme(e2,x2) & Actor(e2,x1) & v_kill(e2) & of(x2,x3)) & n_man(x1))