A young man with a red shirt and board shorts sliding down a ramp on a board.
Nobody is sliding on a ramp.
A young man is sliding down the ramp, so therefore somebody, not nobody, is sliding down the ramp.
exists e1 s1 s2 s3 x1 x2 x3 x4 x5 x6 x7 x8.(a_topic(x1) & with(x1,x2) & subset_of(x4,x2) & on(e1,x8) & n_board(x8) & a_down(s3) & Manner(e1,s3) & Theme(e1,x7) & Actor(e1,x6) & v_slide(e1) & n_ramp(x7) & (x4 = x6) & n_shorts(x4) & of(x4,x5) & n_board(x5) & subset_of(x3,x2) & n_shirt(x3) & a_red(s2) & Theme(s2,x3) & n_man(x1) & a_young(s1) & Theme(s1,x1))
-exists e1 x1 x2.(on(e1,x2) & n_ramp(x2) & Actor(e1,x1) & v_slide(e1) & n_person(x1))