A dog jumps and catches a Frisbee in the grass.
a cat learns to use a litter box
One sentence describes a dog and its activity. The other describes a cat.
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 e1 p1 x1.(Topic(e1,p1) & Actor(e1,x1) & v_learn(e1) & exists e2 x2 x3.(Theme(e2,x2) & Actor(e2,x1) & v_use(e2) & n_box(x2) & of(x2,x3) & n_litter(x3)) & n_cat(x1))