A pelican in mid-flight above a group of pelicans.
The pelicans are migrating south.
The pelicans are flying somewhere. Not necessarily migrating south. It could be anywhere.
exists x1 x2 x3 x4.(a_topic(x1) & in(x1,x2) & above(x2,x3) & of(x3,x4) & n_pelican(x4) & n_group(x3) & n_mid-flight(x2) & n_pelican(x1))
exists e1 s1 x1.(n_pelican(x1) & a_south(s1) & Manner(e1,s1) & Actor(e1,x1) & v_migrate(e1))