People are gathering in a street.
A group of people are in the street.
A group of people are people who are gathering together.
exists e1 x1 x2.(in(e1,x2) & n_street(x2) & Actor(e1,x1) & v_gather(e1) & n_people(x1))
exists p1 x1 x2 x3.(n_street(x3) & in(x1,x3) & of(x1,x2) & n_people(x2) & n_group(x1))