A man in a blue shirt and green cap on a red snowboard.
the man is in a snowboarding competition
Just because a man is on a snowboard does not mean the man is in a snowboarding competition.
exists s1 s2 s3 s4 x1 x2 x3 x4.(a_topic(s1) & subset_of(x3,s1) & on(x3,x4) & n_snowboard(x4) & a_red(s4) & Theme(s4,x4) & n_cap(x3) & a_green(s3) & Theme(s3,x3) & subset_of(x1,s1) & in(x1,x2) & n_shirt(x2) & a_blue(s2) & Theme(s2,x2) & n_man(x1))
exists p1 x1.(n_man(x1) & exists s1 x2.(in(x1,x2) & n_competition(x2) & a_snowboarding(s1) & Theme(s1,x2)))