Question: The central ring of the Hammerstein Ballroom holds several thousand people for events which can take place in a raised platform square with 4 parallel ropes attached with turnbuckle called what?

Context paragraphs:
ROH/NJPW War of the Worlds (2017): War of the Worlds (2017) was a professional wrestling tour co-produced by the American Ring of Honor (ROH) and Japanese New Japan Pro-Wrestling (NJPW) promotions.  The tour's four events took place on May 7 at the Ted Reeve Arena in Toronto, Ontario, May 10 at the Ford Community & Performing Arts Center in Dearborn, Michigan, May 12 at the Hammerstein Ballroom in New York City and May 14 at the 2300 Arena in Philadelphia, Pennsylvania.  The third night aired live on pay-per-view (PPV), while the fourth night was taped for four future episodes, including the 300th overall episode, of ROH's weekly television program, "Ring of Honor Wrestling".  2017 was the fourth year in which ROH and NJPW co-produced events under the War of the Worlds name.  During the third night of the tour, NJPW announced the creation of the IWGP United States Heavyweight Championship.

Kampoeng Rawa: Kampoeng Rawa (alternatively Kampung Rawa, both Indonesian for "Swamp Hamlet") is a tourist attraction in Ambarawa, Central Java, located within the green belt around Lake Rawa Pening.  Opened in August 2012, it is owned and operated by twelve groups of farmers and fishermen who were funded by the Artha Prima Credit Union.  It is intended to improve the welfare of local farmers and fishermen while promoting an understanding of the lake's ecology.  Facilities include a floating restaurant, pendopo, crafts centre, fishing area, and docks.  During holidays the site may be visited by several thousand people.  It has been challenged for its lack of permission to build in the green belt and the possible ecological impact.

Operation Surya Hope: Operation Surya Hope is the name that Indian Army’s Central Command gave to its response in Uttarakhand following the June 2013 North India floods.  The Uttarakhand flood was caused by record unseasonal monsoon rains, cloud burst, floods, flash floods, and, possibly, climate change induced glacier lake outburst floods (GLOFs).  The humanitarian disaster affected millions, stranded over 100,000 pilgrims and tourist in Himalayan religious sites, and killed several thousand people.

Seizing: Seizings are a class of stopping knots used to semi-permanently bind together two ropes, two parts of the same rope, or rope and another object.  Akin to lashings, they use string or small-stuff to produce friction and leverage to immobilize larger ropes.  Seizings are not recommended for heavy loads for critical use as strain reduces the diameter of the main rope and can permit slippage even with proper construction.  According to "The Ashley Book of Knots", "A "seizing" holds several objects together."  The other type of stopping knots are whipping knots.

Jeh language: Jeh (also spelled "Die, Gie, Yaeh") is a language spoken by more than fifteen thousand people in Vietnam.  There are also several thousand speakers in the provinces of Xekong and Attapu in Laos.

ROH/NJPW War of the Worlds: War of the Worlds is a professional wrestling supershow co-produced by the American Ring of Honor (ROH) and Japanese New Japan Pro-Wrestling (NJPW) promotions.  The two promotions announced a partnership in February 2014, which led to the first War of the Worlds event taking place at the Hammerstein Ballroom in New York City the following May.  In 2015, ROH and NJPW presented two War of the Worlds events, both taking place at the 2300 Arena in Philadelphia, Pennsylvania in May.  In 2016, War of the Worlds took place over three shows in Dearborn, Michigan, Toronto and New York City, with Philadelphia added to the tour in 2017.

Hammerstein Ballroom: The Hammerstein Ballroom is a two-tiered, 12,000 sqft ballroom located within the Manhattan Center Studios at 311 West 34th Street in Manhattan in New York City.  The capacity of the ballroom is dependent on the configuration of the room; it seats 2,500 people for theatrical productions and musical performances, and several thousand for events held within a central ring.  The two main balconies—which are unusually close to the ground and gently sloped—seat a total of 1,200.  There are six shallow balconies which are normally used for celebrity guests.  The floor slants down to the stage area to enable those in the back rows to see easily.

Boxing ring: A boxing ring is the space in which a boxing match occurs.  A modern ring, which is set on a raised platform, is square with a post at each corner to which four parallel rows of ropes are attached with a turnbuckle.  Unlike its cousin the wrestling ring, the ropes in a boxing ring are generally connected together between the posts.

Jeffrey City, Wyoming: Jeffrey City is a census-designated place (CDP) and former uranium mining boomtown located in Fremont County, in the central part of the U.S. state of Wyoming.  The town is famous in Wyoming and the American West as symbol of a boomtown that went "bust" very quickly, as the mine was shut down in 1982 and over 95% of the inhabitants left the town within 3 years.  The population was 58 at the 2010 census, far lower than its onetime population of several thousand people.

Golden Gate Ballroom: The Golden Gate Ballroom, originally named the "State Palace Ballroom", was a luxurious ballroom located at the intersection of Lenox Avenue and 142nd Street in Harlem.  It was allegedly the largest public auditorium in Harlem, with 25,000 square feet and a capacity of about five thousand people on the dance floor in addition to several thousand spectators.

Supporting paragraphs: Hammerstein Ballroom Boxing ring
Answer: A boxing ring