0 2 0 http://purl.obolibrary.org/obo/SO_0002140 early_origin_of_replication 'early_origin_of_replication' SubClassOf 'origin_of_replication' http://purl.obolibrary.org/obo/SO_0002141 late_origin_of_replication 'late_origin_of_replication' SubClassOf 'origin_of_replication'