A kid fetches a Frisbee by a tree in the yard.
dog eats steak
A kid is not a dog. "Fetches" describes a different action than "eats". A Frisbee is not a steak.
exists e1 x1 x2 x3 x4.(n_yard(x4) & in(e1,x4) & by(e1,x3) & n_tree(x3) & Theme(e1,x2) & Actor(e1,x1) & v_fetch(e1) & n_frisbee(x2) & n_kid(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_eat(e1) & n_steak(x2) & n_dog(x1))