A young boy is standing on a sports field holding a piece of sports equipment.
a person is using a piece of equipment.
A young boy is a person. Holding a piece of equipment implies that the person is using the equipment.
exists e1 e2 s1 x1 x2 x3 x4 x5 x6.(for(e1,e2) & Theme(e2,x4) & Actor(e2,x1) & v_hold(e2) & of(x4,x5) & n_equipment(x5) & of(x5,x6) & n_sport(x6) & n_piece(x4) & on(e1,x2) & n_field(x2) & of(x2,x3) & n_sport(x3) & Actor(e1,x1) & v_stand(e1) & n_boy(x1) & a_young(s1) & Theme(s1,x1))
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_use(e1) & of(x2,x3) & n_equipment(x3) & n_piece(x2) & n_person(x1))