a group of Indian people talking to each other
A group of African Americans are running down a street.
A group of people can not be both Indian and African American.
exists e1 s1 x1 x2 x3.(a_topic(x1) & of(x1,x2) & all x4.(n_other(x4) -> to(e1,x4)) & Actor(e1,x3) & v_talk(e1) & (x2 = x3) & n_people(x2) & a_indian(s1) & Theme(s1,x2) & n_group(x1))
exists e1 s1 x1 x2 x3.(ne_nam_americans(x2) & a_african(s1) & Theme(s1,x2) & down(e1,x3) & n_street(x3) & Actor(e1,x1) & v_run(e1) & of(x1,x2) & n_group(x1))