Two young boys in blue jackets and helmets are racing their brown horses down a muddy trail.
Tall humans racing
The two boys are racing horses but we don't know if the boys are tall or short from the description given of two boys.
exists e1 s1 s2 s3 s4 x1 x2 x3 x4 x5 x6.(down(e1,x6) & n_trail(x6) & a_muddy(s4) & Theme(s4,x6) & Theme(e1,x5) & Actor(e1,x1) & v_race(e1) & n_horse(x5) & a_brown(s3) & Theme(s3,x5) & of(x5,x1) & n_thing(x1) & in(x1,x2) & subset_of(x4,x2) & n_helmet(x4) & subset_of(x3,x2) & n_jacket(x3) & a_blue(s2) & Theme(s2,x3) & n_boy(x1) & a_young(s1) & Theme(s1,x1) & card_eq_2(x1))
exists e1 x1 x2 x3.(a_topic(x1) & Actor(e1,x3) & v_race(e1) & (x1 = x3) & n_human(x1) & (x1 = x2) & ne_nam_tall(x2))