A boy in a white t-shirt does a trick with his skateboard in a skate park.
A boy practices tricks with his skateboard outdoors.
A boy practices tricks with his skateboard outdoors refers to a boy in white t-shirt
exists e1 s1 x1 x2 x3 x4 x5 x6.(with(e1,x4) & in(x4,x5) & n_park(x5) & of(x5,x6) & n_skate(x6) & n_skateboard(x4) & of(x4,x1) & n_male(x1) & Theme(e1,x3) & Actor(e1,x1) & v_do(e1) & n_trick(x3) & in(x1,x2) & n_t-shirt(x2) & a_white(s1) & Theme(s1,x2) & n_boy(x1))
exists x1 x2 x3 x4 x5.(a_topic(x1) & with(x1,x4) & n_outdoors(x4) & of(x4,x5) & n_skateboard(x5) & of(x4,x1) & n_male(x1) & Time(x1,x3) & n_trick(x3) & n_practice(x1) & of(x1,x2) & n_boy(x2))