A dog jumps and catches a Frisbee in the grass.
The dog is a collie dog.
A dog that jumps and catches a Frisbee is not always a collie dog.
exists s1 x1 x2 x5.(n_grass(x5) & a_topic(s1) & all x3.(n_frisbee(x3) -> exists x4.(subset_of(x4,s1) & in(x4,x5) & for(x4,x3) & n_catch(x4))) & subset_of(x1,s1) & n_jump(x1) & of(x1,x2) & n_dog(x2))
exists p1 x1.(n_dog(x1) & exists x2 x3.((x1 = x2) & n_dog(x2) & of(x2,x3) & n_collie(x3)))