Question: What phenomenon is named after the Phaya Naga and what the Mekhong Full Moon Party film is about?
Sentence (from "Magha Puja"): Māgha Pūjā (Burmese: တပို့တွဲလပြည့်နေ့ ; Khmer: មាឃបូជា , ; Lao: ມະຄະບູຊາ ; Thai: มาฆบูชา ; Sinhalese: නවම් පොහොය ) is an important Buddhist festival celebrated on the full moon day of Māgha in Cambodia, Laos, Nepal, Thailand and on the full moon day of Tabodwe in Myanmar.
Relevant evidence: No