Group of schoolgirls walk home from class.
Some girls are walking.
A group of schoolgirls walking home from class is a detailed version of some girls walking.
exists e1 x1 x2 x3 x4.(ne_org_group(x1) & from(e1,x4) & n_class(x4) & Time(e1,x3) & n_home(x3) & Actor(e1,x1) & v_walk(e1) & of(x1,x2) & n_schoolgirl(x2))
exists e1 x1.(Actor(e1,x1) & v_walk(e1) & n_girl(x1))