Question: What phenomenon said to be often seen on the mekong river and was included in the 2002 Thai comedu-drama, Mekhong Full Moon Party?
Sentence (from "Songkhram River"): Outing there, it flows through Seka district (Nong Khai Province), Wanon Niwat (Sakon Nakhon Province), Si Songkhram district and mouths to the Mekong River in "tambon" Chai Buri, Tha Uthen district, Nakhon Phanom Province.
Relevant evidence: No