Complex sentence: More than 80% of the evacuees in Albay were sent home after conditions improved on January 7; classes which were suspended on January 6, reopened the next day except for schools which were used as evacuation centers.
Split into simpler sentences: More than 80% of the evacuees in Albay were sent home after conditions improved on January 7. Classes that were suspended on January 6 reopened the next day except for schools that were used as evacuation centers.