A tan dog sits in the sand by a beach looking sad.
A dog swims in the ocean.
A dog cannot be swimming in the ocean and sitting in the sand at the same time.
exists e1 e2 p1 s1 x1 x2 x3.(n_sand(x2) & for(e1,e2) & exists s2.(Theme(s2,x1) & a_sad(s2)) & Topic(e2,p1) & Actor(e2,x1) & v_look(e2) & by(e1,x3) & n_beach(x3) & in(e1,x2) & Actor(e1,x1) & v_sit(e1) & n_dog(x1) & a_tan(s1) & Theme(s1,x1))
exists x1 x2 x3.(n_ocean(x3) & a_topic(x1) & in(x1,x3) & n_swim(x1) & of(x1,x2) & n_dog(x2))