A dog runs in a grassy field.
A puppy is running to catch a stick.
A dog runs in a grassy field does not necessary that a puppy is running to catch a stick.
exists e1 s1 x1 x2.(in(e1,x2) & n_field(x2) & a_grassy(s1) & Theme(s1,x2) & Actor(e1,x1) & v_run(e1) & n_dog(x1))
exists e1 p1 x1 x2.(Topic(e1,p1) & exists e2 x3.(Theme(e2,x3) & Actor(e2,x1) & v_catch(e2) & n_stick(x3)) & Actor(e1,x2) & v_run(e1) & n_puppy(x2) & n_puppy(x1))