"PIE" . "121145" . _:Bb0f00351a9aa6f1e81efa1c54d6411b8 . "*perkʷ‑o/u‑" . "Etymology for: quercus (la1353)" . "*perkʷ‑o/u‑" . . _:Bb0f00351a9aa6f1e81efa1c54d6411b8 "*perkʷ‑o/u‑" .