A guy wearing red sweater is about to be thrown of a horse.
a guy wears only black
The guy is wearing a red sweater and not wearing black.
exists e1 p1 s1 s2 x1 x2 x3.(Topic(s2,p1) & Actor(s2,x1) & a_about(s2) & exists e2 x4.(of(e2,x4) & n_horse(x4) & Theme(e2,x1) & v_throw(e2)) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & n_sweater(x3) & a_red(s1) & Theme(s1,x3) & (x1 = x2) & n_guy(x1))
exists e1 p1 x1.(exists s1.(r_only(s1) & Theme(s1,x1) & a_black(s1)) & Topic(e1,p1) & Actor(e1,x1) & v_wear(e1) & n_guy(x1))