A crowded street full of Asian people.
The crowds are all Black people.
Asian people cannot become black
exists s1 s2 s3 x1 x2 x3.(a_topic(x1) & of(s2,x3) & n_people(x3) & a_asian(s3) & Theme(s3,x3) & Theme(s2,x2) & a_full(s2) & (x1 = x2) & n_street(x1) & a_crowded(s1) & Theme(s1,x1))
exists p1 x1.(n_crowd(x1) & all x2 s1.((n_people(x2) & a_black(s1) & Theme(s1,x2)) -> (x1 = x2)))