A group of girls is walking down the street.
A bunch of girls are going down the street.
Walking is another way of saying going.
exists e1 s1 x1 x2 x3.(n_street(x3) & a_down(s1) & Manner(e1,s1) & Theme(e1,x3) & Actor(e1,x1) & v_walk(e1) & of(x1,x2) & n_girl(x2) & n_group(x1))
exists e1 x1 x2 x3.(n_street(x3) & down(e1,x3) & Actor(e1,x1) & v_go(e1) & of(x1,x2) & n_girl(x2) & n_bunch(x1))