children are sleeping as someone reads a song book.
Children sleep as their mother quietly finishes a quilt.
It is either the person reads a song book or quietly finishes a quilt.
exists e1 p1 x1.(exists e2 x2 x3 x4.(Theme(e2,x3) & Actor(e2,x2) & v_read(e2) & n_book(x3) & of(x3,x4) & n_song(x4) & n_person(x2)) & as(e1,p1) & Actor(e1,x1) & v_sleep(e1) & n_child(x1))
exists e1 p1 x1 x2.(exists e2 s1 x3.(a_quietly(s1) & Manner(e2,s1) & Theme(e2,x3) & Actor(e2,x2) & v_finish(e2) & n_quilt(x3)) & n_mother(x2) & of(x2,x1) & n_thing(x1) & as(e1,p1) & Actor(e1,x1) & v_sleep(e1) & n_child(x1))