A black and white dog is swimming in some water
The dog is chasing bears.
A dog that is swimming can't be chasing bears.
exists e1 s1 s2 x1 x2.(in(e1,x2) & n_water(x2) & Actor(e1,x1) & v_swim(e1) & n_dog(x1) & a_white(s2) & Theme(s2,x1) & a_black(s1) & Theme(s1,x1))
exists e1 x1 x2.(n_dog(x1) & Theme(e1,x2) & Actor(e1,x1) & v_chase(e1) & n_bear(x2))