A shirtless boy in flip-flops is riding a wheelie on his bike.
The boy does tricks on his bike.
the boys trick in his bike is riding in a wheelie
exists e1 s1 x1 x2 x3 x4.(on(e1,x4) & n_bike(x4) & of(x4,x1) & n_male(x1) & Theme(e1,x3) & Actor(e1,x1) & v_ride(e1) & n_wheelie(x3) & in(x1,x2) & n_flip-flop(x2) & n_boy(x1) & a_shirtless(s1) & Theme(s1,x1))
exists e1 x1 x2 x3.(n_bike(x3) & of(x3,x1) & n_male(x1) & n_boy(x1) & on(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & n_trick(x2))