A young boy sits while eating.
A young boy enjoys his ice cream sandwich.
The fact that a boy is eating doesn't imply that he is eating an ice cream sandwich. Just because a boy is eating doesn't mean he enjoys what he's eating.
exists e2 e1 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 x3 x4.(Theme(e1,x2) & Actor(e1,x1) & v_enjoy(e1) & n_sandwich(x2) & of(x2,x4) & n_cream(x4) & of(x2,x3) & n_ice(x3) & of(x2,x1) & n_male(x1) & n_boy(x1) & a_young(s1) & Theme(s1,x1))