A woman in pink is standing alone in the middle of the street.
A woman in purple is on a crowded sidewalk.
A woman is either wearing purple or pink, not both.  A person cannot be alone in a crowded place.  A person cannot stand on a sidewalk and a street simultaneously.
exists e1 s1 x1 x2 x3 x4.(n_street(x4) & n_middle(x3) & in(e1,x3) & of(x3,x4) & a_alone(s1) & Manner(e1,s1) & Actor(e1,x1) & v_stand(e1) & in(x1,x2) & n_pink(x2) & n_woman(x1))
exists p1 x1 x2.(exists s1 x3.(on(x1,x3) & n_sidewalk(x3) & a_crowded(s1) & Theme(s1,x3)) & in(x1,x2) & n_purple(x2) & n_woman(x1))