Question: Where is Muay thai native to?
About the article "Thailand", section "Sports".

Candidate passages:
Muay Thai has fixed its weight division similarly to boxing.
International Kickboxing Federation (IKF): Muay Thai Welterweight (Pro & Amateur) 142.1 lbs.
- 147 lbs.
(64.59 kg - 66.8 kg)  World Muay Thai Council (WMC), welterweight range is from 140 pounds (63.5 kg) to 147 pounds (66.6 kg) World Muay Thai Federation (WMF), the official amateur organization, fixed welterweight from 63.5 to 67 kg for adult; the Junior category is the same as adult  
Sergey Ivanovich Zayashnikov () is the President of the Russian Muay Thai League, martial arts writer, TV commentator, promoter, one of the founders of the Muay Thai in Russia.
He is the author of the first book about karate in the USSR (Karate Technique, 1990), co-author of the first book about Russian hand combat in Russia (Russian-Style Hand to Hand Combat,1991), co-author of the first book about Muay Thai in Russia (Thailand boxing, 1992).
Sergey Zayashnikov was born in Kuli, Chita Oblast, Russia on 19 October 1964.
In 1986 he graduated from Novosibirsk State Technical University.
In 1992 he founded Russian Muay Thai League (R.M.T.L.)
(from 1992 to 1993 owner and sponsor, from 1993 to present time — the President of R.M.T.L.).
In 1994 he sent R.M.T.L.
team (4 boxers) to the First IFMA World Amateur Muay Thai Championship (Chonburi, Thailand).
Three of them won gold, silver and bronze medals.
In 1996 he gained recognition of the Muay Thai as an official sport in the Russian Government and Russian Olympic Committee.
He founded Russian Thai Boxing Federation (R.T.B.F.)
on the basis of the R.M.T.L., where he functioned as the RTBF vice-president until 2007.
From 1996 to 2009 he was an announcer of the first Russian Muay Thai TV show, which broadcast weekly on Russian satellite channel NTV Plus Sport .
In 2007 he organized Russia-USA Muay Thai Professional Tournament in Roseland Ballroom, New York for the first time, where in the next 3 year organized series of Muay Thai Tournaments, promoted by WBL Muay Thai.  
Nakamoto began fighting Muay Thai professionally in 2005.
She is an eight-time world champion in the sport.
Having produced a perfect 16-0 record to date. 
Wai Khru Ram Muay (, , ) is a warm up activity in Thai culture that is performed by participants in Muay Thai competitions.
"Wai" is an action of Thais to show respect to others by putting the hands together like in prayer.
"Khru" means teacher.
"Ram" means dance in the old Thai traditional style.
"Muay" means boxing.
Usually Thais prefer to call it "Ram Muay" or "Wai Khru" for short.
Ram Muay is the way to show respect to the teachers and the trainers.
Also, in the past Muay Thai was usually fought in front of the King, so Ram Muay was also to apologize to the King for the brutality in fighting.
The fighter first performs the Wai Khru, circling the ring three times before kneeling and bowing three times as a sign of respect to God and man.
He also bows to Buddha to ask for protection for himself and his opponent and for an honourable fight.
The fighter then performs the Ram Muay, whose simple movements demonstrate a fighter's control and style.
Each fighter performs the Ram Muay on each side of the ring to demonstrate his prowess to the audience.
The Ram Muay is a personal ritual, ranging from the very complex to the very simple, and often contains clues about who trained the fighter and where the fighter is from.
The practitioner may wear a headband called a "Mongkhon" and armbands known as "Pra Jiad" during the ceremony, and the Ram Muay may be accompanied by music.
The Mongkhon is unique to Thai boxing and not worn in Cambodia or Burma. 
The traditional martial arts of the Indochinese peninsula are related among one another, and as a group to southern Chinese and Indian martial arts.
The most salient common feature is '"Indochinese kickboxing.
Khmer Pradal Serey – Possible predecessor of Muay Thai with an emphasis on elbow techniques.
Siamese Muay Boran (Ancient Boxing) – Predecessor of Muay Thai, allows the use of headbutts.
Thai boxing or Muay Thai – The modern Thai martial art with strong emphasis on knee and elbow strikes.
Burmese Lethwei – Traditional kickboxing from Myanmar emphasising knees, elbow strikes, headbutt, punch, and kicks.
Laotian Muay Lao – Lao kickboxing Malay Tomoi – kickboxing style from northern Malaysia, descended from the older muay boran.