A person in a red shirt is riding a white horse chasing a young bull.
The person in red is riding a horse that is chasing a bull.
Sentance two says the same as one, only excluding the adjectives of the red shirt, white horse, and young bull.
exists e1 e2 s1 s2 s3 x1 x2 x3 x4.(for(e1,e2) & Theme(e2,x4) & Actor(e2,x1) & v_chase(e2) & n_bull(x4) & a_young(s3) & Theme(s3,x4) & Theme(e1,x3) & Actor(e1,x1) & v_ride(e1) & n_horse(x3) & a_white(s2) & Theme(s2,x3) & in(x1,x2) & n_shirt(x2) & a_red(s1) & Theme(s1,x2) & n_person(x1))
exists e1 e2 x1 x2 x3 x4 x5.(n_person(x1) & Theme(e2,x3) & Actor(e2,x1) & v_ride(e2) & Theme(e1,x5) & Actor(e1,x4) & v_chase(e1) & n_bull(x5) & (x3 = x4) & n_horse(x3) & in(x1,x2) & n_red(x2))