A young boy sits while eating.
A little boy is eating a hamburger.
We can't tell if he is eating a hamburger or something else.
exists e1 e2 s1 x1.(while(e1,e2) & Actor(e2,x1) & v_eat(e2) & Actor(e1,x1) & v_sit(e1) & n_boy(x1) & a_young(s1) & Theme(s1,x1))
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_eat(e1) & n_hamburger(x2) & n_boy(x1) & a_little(s1) & Theme(s1,x1))