A shirtless man is doing a skateboard trick.
A tall human doing a trick.
Humans can be either male or female, and it is possible to do a trick without a skateboard.
exists e1 s1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & n_trick(x2) & of(x2,x3) & n_skateboard(x3) & n_man(x1) & a_shirtless(s1) & Theme(s1,x1))
exists e1 s1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_do(e1) & n_trick(x3) & (x1 = x2) & n_human(x1) & a_tall(s1) & Theme(s1,x1))