A young white boy in a uniform is playing roller hockey.
A kid is playing a sport.
A young boy is a kid, he is playing roller hockey, roller hocey is a sort.
exists e1 s1 s2 x1 x2 x3 x4.(Theme(e1,x3) & Actor(e1,x1) & v_play(e1) & n_hockey(x3) & of(x3,x4) & n_roller(x4) & in(x1,x2) & n_uniform(x2) & n_boy(x1) & a_white(s2) & Theme(s2,x1) & a_young(s1) & Theme(s1,x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_sport(x2) & n_kid(x1))