A woman in a red dress and black mask is on a crowded dance floor
Everyone on the dance floor is wearing a black mask.
Just because one woman is wearing a black mask, does not mean that everyone else is.
exists p1 s1 s2 x1 x2 x3 x4.(exists s3 x5 x6.(on(x1,x5) & n_floor(x5) & of(x5,x6) & n_dance(x6) & a_crowded(s3) & Theme(s3,x5)) & in(x1,x2) & n_mask(x4) & a_black(s2) & Theme(s2,x4) & n_dress(x3) & subset_of(x4,x2) & subset_of(x3,x2) & a_red(s1) & Theme(s1,x2) & n_woman(x1))
exists x2 x3.(n_floor(x2) & of(x2,x3) & n_dance(x3) & all x1.(n_person(x1) -> exists e1 s1 x4.(Theme(e1,x4) & Actor(e1,x1) & v_wear(e1) & n_mask(x4) & a_black(s1) & Theme(s1,x4) & on(x1,x2))))