A group of people are gathered in a city street.
A crowd of people gather in the city.
group of people implies  group of people
exists e1 x1 x2 x3 x4.(in(e1,x3) & n_street(x3) & of(x3,x4) & n_city(x4) & Theme(e1,x1) & v_gather(e1) & of(x1,x2) & n_people(x2) & n_group(x1))
exists e1 x1 x2 x3.(n_city(x3) & in(e1,x3) & Actor(e1,x1) & v_gather(e1) & of(x1,x2) & n_people(x2) & n_crowd(x1))