A guy grinding down a railing on his skateboard with a motorcycle in the foreground
A man is practicing for a skateboard competition.
A man skateboarding down a railing is not necessarily practicing for a skateboard competition.
exists e1 s1 x1 x2 x3 x4 x5 x6.(n_foreground(x6) & a_topic(x1) & a_down(s1) & Manner(e1,s1) & Theme(e1,x3) & Actor(e1,x2) & v_grind(e1) & on(x3,x4) & with(x4,x5) & in(x5,x6) & n_motorcycle(x5) & n_skateboard(x4) & of(x4,x1) & n_male(x1) & n_rail(x3) & (x1 = x2) & n_guy(x1))
exists e1 s1 x1 x2.(for(e1,x2) & n_competition(x2) & a_skateboard(s1) & Theme(s1,x2) & Actor(e1,x1) & v_practice(e1) & n_man(x1))