A woman using a green bucket is squatting while cleaning.
the woman is on a ladder
Someone who is squatting typically is not on a ladder while doing so.
exists e1 e2 s1 x1 x2 x3 x4.(while(e2,x4) & n_cleaning(x4) & Actor(e2,x1) & v_squat(e2) & Theme(e1,x3) & Actor(e1,x2) & v_use(e1) & n_bucket(x3) & a_green(s1) & Theme(s1,x3) & (x1 = x2) & n_woman(x1))
exists p1 x1.(n_woman(x1) & exists x2.(on(x1,x2) & n_ladder(x2)))