A boy is performing a skateboarding trick with trees in the background.
a kid is playing chess
The difference in the two is the boy skateboarding and the kid, which could be either a boy or a girl, playing chess.
exists e1 e2 x1 x2 x3 x4.(n_background(x4) & Theme(e2,x2) & Actor(e2,x1) & v_perform(e2) & with(x2,x3) & in(x3,x4) & n_tree(x3) & n_trick(x2) & Actor(e1,x2) & v_skateboard(e1) & n_boy(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_chess(x2) & n_kid(x1))