A man is sitting, with his skateboard, at the bottom of a skateboard wall below a logo stating Vans "off the wall".
The man is wearing a red helmet.
A man can have a skateboard without wearing a helmet. Not all helmets are red.
exists e2 e1 s1 x1 x2 x3 x4 x5 x6 x7.(ne_nam_vans(x7) & n_bottom(x3) & at(e1,x3) & of(x3,x4) & below(x4,x5) & off(e2,x4) & n_wall(x4) & n_wall(x4) & a_''(s1) & Theme(s1,x4) & Theme(e2,x7) & Actor(e2,x6) & v_state(e2) & (x5 = x6) & n_logo(x5) & of(x4,x2) & n_skateboard(x2) & n_skateboard(x2) & with(e1,x2) & of(x2,x1) & n_male(x1) & Actor(e1,x1) & v_sit(e1) & n_man(x1))
exists e1 s1 x1 x2.(n_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & n_helmet(x2) & a_red(s1) & Theme(s1,x2))