entity_id,source_id,evidence_type,source_note
ENT_PHLEGETHON,SRC_HOMER_ILIAD_ODYSSEY,direct attestation,Odyssey 10.513: the fiery Pyriphlegethon of the underworld.
ENT_PHLEGETHON,SRC_THEOI_HOME,index attestation,"Attested in Theoi Project index (Greek gods, spirits, heroes in classical literature)."
ENT_PHLEGETHON,SRC_THEOI_UNDERWORLD,index attestation,Literary attestation in classical/mythographic tradition; cult evidence varies by entity.