entity_id,source_id,evidence_type,source_note
ENT_UNDERWORLD,SRC_ELIADE_ER,scholarly attestation,"Cross-traditional concept documented in Encyclopedia of Religion, 2nd ed. (Jones 2005)."
ENT_UNDERWORLD,SRC_HESIOD_THEOGONY,direct attestation,"Tartarus, primordial abyss and underworld realm (Theogony 119, 720–819)."