Hockey player in red hockey shirt with white and blue accents wearing a blue helmet on the ice.
Nobody is wearing a helmet.
Hockey player is wearing a helmet. Denoting nobody is wearing a helmet is contradictory.
exists e1 s1 s2 s3 s4 x1 x2 x3 x4 x5 x6 x7 x8.(n_ice(x8) & a_topic(x1) & in(x1,x3) & with(x3,x5) & Theme(e1,x7) & Actor(e1,x6) & v_wear(e1) & on(x7,x8) & n_helmet(x7) & a_blue(s4) & Theme(s4,x7) & (x5 = x6) & n_accent(x5) & a_blue(s3) & Theme(s3,x5) & a_white(s2) & Theme(s2,x5) & n_shirt(x3) & of(x3,x4) & n_hockey(x4) & a_red(s1) & Theme(s1,x3) & n_player(x1) & (x1 = x2) & ne_nam_hockey(x2))
-exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & n_helmet(x2) & n_person(x1))