A woman is a blue top is walking amidst a crowd.
A woman is walking down the sidewalk.
Crowds aren't necessarily on a sidewalk.
exists e1 p1 x1 x2 x3.(amidst(e1,x3) & n_crowd(x3) & Actor(e1,x1) & v_walk(e1) & exists s1 x4.((x2 = x4) & n_top(x4) & a_blue(s1) & Theme(s1,x4)) & (x1 = x2) & n_woman(x1))
exists e1 s1 x1 x2.(n_sidewalk(x2) & a_down(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_woman(x1))