Boy in red vest and blue and white trunks on wakeboard.
The boy is shirtless while wakeboarding.
The boy that is shirtless cannot be on a red vest and blue and white trunks.
exists s1 s2 s3 s4 x1 x2 x3.(ne_nam_boy(s1) & a_topic(s1) & in(s1,x1) & on(x1,x3) & n_wakeboard(x3) & n_trunk(x1) & a_white(s4) & Theme(s4,x1) & a_blue(s3) & Theme(s3,x1) & of(x1,x2) & n_vest(x2) & a_red(s2) & Theme(s2,x1))
exists e1 s1 x1.(n_boy(x1) & while(s1,e1) & Actor(e1,x1) & v_wakeboard(e1) & Theme(s1,x1) & a_shirtless(s1))