query: sport robert guerrero
supports: Weight classes are divisions of competition used to match competitors against others of their own size. This reduces the exclusion of smaller athletes in sports where physical size gives a significant advantage. Weight classes are used in a variety of sports, especially combat sports (such as boxing, wrestling, and mixed martial arts).  Greco-Roman (US) or Graeco-Roman (UK) wrestling is a style of wrestling that is practiced worldwide. It was contested at the first modern Olympic Games in 1896 and has been included in every edition of the summer Olympics held since 1908. Two wrestlers are scored for their performance in two three-minute periods, which can be terminated early by a pin (or fall). This style of wrestling forbids holds below the waist; this is the major difference from freestyle wrestling, the other form of wrestling at the Olympics. This restriction results in an emphasis on throws because a wrestler cannot use trips to take an opponent to the ground, or avoid throws by hooking or grabbing the opponent's leg. Featherweight is a weight class in the combat sports of boxing, kickboxing, mixed martial arts and Greco-Roman wrestling. Nevada (Spanish for "snowy"; see pronunciations) is a state in the Western, Mountain West, and Southwestern regions of the United States of America. Nevada is the 7th most extensive, the 34th most populous, and the 9th least densely populated of the 50 United States. Nearly three-quarters of Nevada's people live in Clark County, which contains the Las VegasParadise metropolitan area where three of the state's four largest incorporated cities are located. Nevada's capital is Carson City. Nevada is officially known as the "Silver State" because of the importance of silver to its history and economy. It is also known as the "Battle Born State", because it achieved statehood during the Civil War (the words "Battle Born" also appear on the state flag); as the "Sage-brush State", for the native plant of the same name; and as the "Sage-hen State". Nevada borders Oregon to the northwest, Idaho to the northeast, California to the west, Arizona to the southeast and Utah to the east. Boxing is a combat sport in which two people wearing protective gloves throw punches at each other for a predetermined set of time in a boxing ring. A combat sport, or fighting sport, is a competitive contact sport with one-on-one combat. Determining the winner depends on the particular contest's rules. In many fighting sports, a contestant wins by scoring more points than the opponent or by disabling the opponent. Boxing, wrestling, Muay Thai, Tae Kwon Do, Judo, Brazilian Jiu-jitsu, Sambo, and Mixed Martial Arts are examples of combat sports. Middleweight is a weight class in combat sports. Boxing. In Boxing, the middleweight division is above 154 lbs (69.9 kg) and up to 160 lbs (72.5 kg). Welterweight is a weight class in combat sports. Originally the term "welterweight" was used only in boxing, but other combat sports like Muay Thai, taekwondo and mixed martial arts also use it for their own weight division system to classify the opponents. In most sports that use it, welterweight is heavier than lightweight but lighter than middleweight. Lightweight is a weight class in the sports of boxing, kickboxing, mixed martial arts, and rowing. Muay Thai is a combat sport of Thailand that uses stand-up striking along with various clinching techniques.
  This physical and mental discipline which includes combat on shins is known as "the art of eight limbs" because it is characterized by the combined use of fists, elbows, knees, shins, being associated with a good physical preparation that makes a full-contact fighter very efficient.
  Muay Thai became widespread internationally in the twentieth century, when practitioners defeated notable practitioners of other martial arts. The professional league is governed by The Professional Boxing Association of Thailand (P.A.T) sanctioned by The Sport Authority of Thailand (S.A.T.), and World Muaythai Federation (WMF) overseas. California is the most populous state in the United States and the third most extensive by area. Located on the western (Pacific Ocean) coast of the U.S., California is bordered by the other U.S. states of Oregon, Nevada, and Arizona and shares an international border with the Mexican state of Baja California. The state capital is Sacramento. Los Angeles is California's most populous city, and the country's second largest after New York City. The state also has the nation's most populous county, Los Angeles County, and its largest county by area, San Bernardino County. Taekwondo (or ,  ) is a Korean martial art, characterized by its emphasis on head-height kicks, jumping and spinning kicks, and fast kicking techniques. Mixed martial arts (MMA) is a full-contact combat sport that allows both striking and grappling, both standing and on the ground, using techniques from other combat sports and martial arts. The first documented use of the term "mixed martial arts" was in a review of UFC 1 by television critic Howard Rosenberg in 1993. The term gained popularity when newfullcontact.com, then one of the largest websites covering the sport, hosted and republished the article. The question of who actually coined the term is subject to debate. Kickboxing is a group of stand-up combat sports based on kicking and punching, historically developed from Karate, Muay Thai, Khmer Boxing, and Western boxing. Kickboxing is practiced for self-defense, general fitness, or as a contact sport. Los Angeles (Spanish for "The Angels"), officially the City of Los Angeles and often known by its initials L.A., is the second-most populous city in the United States (after New York City), the most populous city in California and the county seat of Los Angeles County. Situated in Southern California, Los Angeles is known for its mediterranean climate, ethnic diversity, sprawling metropolis, and as a major center of the American entertainment industry. Los Angeles lies in a large coastal basin surrounded on three sides by mountains reaching up to and over . Robert Joseph Guerrero ( born March 27 , 1983 ) is an American professional boxer . He is a former two - weight world champion , having held the IBF featherweight ( twice ) and super featherweight titles . He is also a former WBA and WBO interim lightweight and WBC interim welterweight champion . Guerrero is trained by his father Ruben Guerrero , a former amateur champion , who introduced Robert and his five brothers to boxing as youngsters growing up in Gilroy , California .
candidates: boxing combat sport contact sport freestyle wrestling kickboxing martial arts mixed martial arts professional boxing sambo spanish sport taekwondo wrestling
answer: professional boxing