A man in a blue shirt is riding a brown horse.
The man on the horse is wearing a blue shirt.
If a man is in a shirt, the man is wearing the shirt. If a man is riding a horse, he is on the horse.
exists e1 s1 s2 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_ride(e1) & n_horse(x3) & a_brown(s2) & Theme(s2,x3) & in(x1,x2) & n_shirt(x2) & a_blue(s1) & Theme(s1,x2) & n_man(x1))
exists e1 s1 x1 x2 x3.(n_horse(x2) & n_man(x1) & Theme(e1,x3) & Actor(e1,x1) & v_wear(e1) & n_shirt(x3) & a_blue(s1) & Theme(s1,x3) & on(x1,x2))