A man with green glasses does a trick on his skateboard.
A man is good on his skateboard.
Doing a trick on the skateboard doesn't guarantee one is good.
exists e1 s1 x1 x2 x3 x4.(on(e1,x4) & n_skateboard(x4) & of(x4,x1) & n_male(x1) & Theme(e1,x3) & Actor(e1,x1) & v_do(e1) & n_trick(x3) & with(x1,x2) & n_glass(x2) & a_green(s1) & Theme(s1,x2) & n_man(x1))
exists s1 x1 x2.(on(s1,x2) & n_skateboard(x2) & of(x2,x1) & n_male(x1) & Theme(s1,x1) & a_good(s1) & n_man(x1))