A boy in a red shirt riding a skateboard quickly down the road.
The boy's shirt was not blue.
Red and blue are different color so red is not blue.
exists e1 s1 s2 x1 x2 x3 x4 x5.(n_road(x5) & a_topic(x1) & in(x1,x2) & down(e1,x5) & a_quickly(s2) & Manner(e1,s2) & Theme(e1,x4) & Actor(e1,x3) & v_ride(e1) & n_skateboard(x4) & (x2 = x3) & n_shirt(x2) & a_red(s1) & Theme(s1,x2) & n_boy(x1))
exists x1 x2.(n_shirt(x2) & of(x2,x1) & n_boy(x1) & -exists s1.(Theme(s1,x2) & a_blue(s1)))