A young boy in green is eating chocolate ice cream.
A young boy at a party.
The boy can be eating ice cream at any location, not just a party.
exists e1 s1 x1 x2 x3 x4 x5.(Theme(e1,x3) & Actor(e1,x1) & v_eat(e1) & n_cream(x3) & of(x3,x5) & n_ice(x5) & of(x3,x4) & n_chocolate(x4) & in(x1,x2) & n_green(x2) & n_boy(x1) & a_young(s1) & Theme(s1,x1))
exists s1 x1 x2.(a_topic(x1) & at(x1,x2) & n_party(x2) & n_boy(x1) & a_young(s1) & Theme(s1,x1))