A boy standing on a tricycle.
A great human standing.
Not all boys are great humans.
exists e1 x1 x2 x3.(a_topic(x1) & on(e1,x3) & n_tricycle(x3) & Actor(e1,x2) & v_stand(e1) & (x1 = x2) & n_boy(x1))
exists s1 s2 x1.(a_topic(x1) & n_standing(x1) & a_human(s2) & Theme(s2,x1) & a_great(s1) & Theme(s1,x1))