The large brown dog with the red collar is in the grass.
The dog lost its collar.
The dog can't have a red collar while having lost its collar.
exists p1 s1 s2 s3 x1 x2 x3.(n_grass(x3) & n_collar(x2) & a_red(s3) & Theme(s3,x2) & n_dog(x1) & a_brown(s2) & Theme(s2,x1) & a_large(s1) & Theme(s1,x1) & in(x1,x3) & with(x1,x2))
exists e1 x1 x2.(n_collar(x2) & of(x2,x1) & n_thing(x1) & n_dog(x1) & Theme(e1,x2) & Actor(e1,x1) & v_lose(e1))