Two boys are at a BMX park and one is doing tricks on his bike.
Two boys at a BMX park.
Two boys are a BMX park is being restated.
exists e1 p1 x1 x2 x3 x4.(on(e1,x4) & n_bike(x4) & of(x4,x3) & n_male(x3) & Theme(e1,x3) & Actor(e1,x2) & v_do(e1) & n_trick(x3) & n_thing(x2) & card_eq_1(x2) & exists x5 x6.(at(x1,x5) & n_park(x5) & (x5 = x6) & ne_org_bmx(x6)) & n_boy(x1) & card_eq_2(x1))
exists x1 x2 x3.(a_topic(x1) & at(x1,x2) & n_park(x2) & (x2 = x3) & ne_org_bmx(x3) & n_boy(x1) & card_eq_2(x1))