A group of people wearing black stretch.
The group is outside.
People don't have to be outside.
exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & of(x1,x2) & Theme(e1,x4) & Actor(e1,x3) & v_wear(e1) & n_stretch(x4) & a_black(s1) & Theme(s1,x4) & (x2 = x3) & n_people(x2) & n_group(x1))
exists s1 x1.(n_group(x1) & Theme(s1,x1) & a_outside(s1))