A white dog running on sand.
A chocolate lab swims in the ocean.
The running white dog cannot be the chocolate lab swimming at the same time
exists e1 s1 x1 x2 x3.(a_topic(x1) & on(e1,x3) & n_sand(x3) & Actor(e1,x2) & v_run(e1) & (x1 = x2) & n_dog(x1) & a_white(s1) & Theme(s1,x1))
exists x1 x2 x3 x4.(n_ocean(x4) & a_topic(x1) & in(x1,x4) & n_swim(x1) & of(x1,x3) & n_lab(x3) & of(x1,x2) & n_chocolate(x2))