Question: What is the name of the urinal in the stadium that served as the main stadium for the opening and closing ceremonies of the 1964 Summer Olympic Games?

Context paragraphs:
List of Olympic venues in athletics: For the Summer Olympics, there are 60 venues that have been or will be used for athletics.  These venues have been the main stadium that has also served as host for both the opening and closing ceremonies of the Summer Olympics, with a notable exception being the Estádio Olímpico João Havelange, who hosted athletics events at Rio 2016; the ceremonies were hosted in the Maracanã.

National Stadium (Tokyo): National Stadium (国立競技場 , Shin kokuritsu kyōgijō ) was a multi-purpose stadium in Kasumigaoka, Shinjuku, Tokyo, Japan.  The stadium served as the main stadium for the opening and closing ceremonies, as well as being the venue for track and field events at the 1964 Summer Olympic Games.  The Japan national football team's home matches and major football club cup finals were held at the stadium.  The stadium's official capacity was 57,363, but the real capacity was only 48,000 seats.

Rice-Eccles Stadium: Rice-Eccles Stadium is an outdoor college football stadium in Salt Lake City, Utah, on the campus of the University of Utah.  It is the home field of the Utah Utes of the Pac-12 Conference.  It served as the main stadium for the 2002 Winter Olympics; the Opening and Closing Ceremonies were held at the stadium, which was temporarily renamed "Rice-Eccles Olympic Stadium".

Centennial Olympic Stadium: Centennial Olympic Stadium was the 85,000-seat main stadium of the 1996 Summer Olympic Games and the 1996 Summer Paralympic Games in Atlanta.  Construction of the stadium began in 1993, and it was complete and ready for the Opening Ceremony in July 1996, where it hosted track and field events and the closing ceremony.  After the Olympics and Paralympics, it was reconstructed into the baseball-specific Turner Field, used by the Atlanta Braves of Major League Baseball for 20 seasons (1997–2016).  After the Braves departed for SunTrust Park, the facility was purchased by Georgia State University, which rebuilt the stadium a second time as Georgia State Stadium, designed for American football.

Salt Lake 2002 Olympic Cauldron Park: The Salt Lake 2002 Olympic Cauldron Park is a plaza located at the south end of Rice-Eccles Stadium on the campus of the University of Utah in Salt Lake City, Utah.  During the 2002 Winter Olympics, Rice-Eccles Stadium was known as "Rice-Eccles Olympic Stadium" and hosted the Opening and Closing Ceremonies.  The plaza contains a 2002 Winter Olympic museum, the Olympic cauldron, and other memorabilia from the 2002 Olympic Games.  As the University of Utah moves forward with stadium expansion and limited space, the future of the park is uncertain.  The Hoberman Arch was removed in August 2014, while other portions of the park, such as the film, are no longer functional.

The Gambia at the 2016 Summer Olympics: The Gambia competed at the 2016 Summer Olympics in Rio de Janeiro, which was held from 5 to 21 August 2016.  The country's participation at Rio marked its ninth appearance at the Summer Olympic Games since its début at the 1984 Summer Olympics.  The delegation included two track and field athletes, Adama Jammeh and Gina Bass, who both qualified after meeting the qualification standards for their respective events, one judoka, Faye Njie, who made the Games through a quota place and one swimmer, Pap Jonga, who earned a universality place to enter the Games.  The Gambia made their début appearances in the judo and swimming events.  Bass was selected as the flag bearer for the opening and closing ceremonies.  All four athletes were eliminated from the first rounds of their events.

List of Olympic venues in equestrian: For the Summer Olympics, there are 53 venues that have or will be used for equestrian.  From 1912 to 1992, the events took place in more than one venue.  Since the 1992 Summer Olympics, the equestrian events have taken place on a single venue in an effort to reduce costs.  During the 1964 to the 1980 Summer Olympics, an equestrian event was the final event before the closing ceremonies of the respective Olympics.  The last equestrian event that took place at the main stadium was at the 1988 Summer Olympics though it was not the final event before the closing ceremonies.  That honor would fall for the end of the men's marathon event.  Stockholm Olympic Stadium is the only equestrian venue to serve host for more than one Summer Olympics, doing so in 1912 and 1956.

New National Stadium (Tokyo): New National Stadium (新国立競技場 ) is a multi-purpose stadium under construction in Kasumigaoka, Shinjuku, Tokyo, Japan.  The stadium will serve as the main stadium for the opening and closing ceremonies, as well as being the venue for track and field events at the 2020 Summer Olympic Games.

Olympic Games ceremony: Olympic Games ceremonies of the Ancient Olympic Games were an integral part of these Games; the modern Olympic games have opening, closing and medal ceremonies.  Some of the elements of the modern ceremonies harken back to the Ancient Games from which the Modern Olympics draw their ancestry.  An example of this is the prominence of Greece in both the opening and closing ceremonies.  During the 2004 Games, the medal winners received a crown of olive branches, which was a direct reference to the Ancient Games, in which the victor's prize was an olive wreath.  The various elements of the ceremonies are mandated by the Olympic Charter and cannot be changed by the host nation.  Even the artistic portion of the opening and closing ceremonies must meet the approval of the International Olympic Committee (IOC).

Sanistand: Sanistand was a urinal for women manufactured by Japanese toilet maker giant TOTO from 1951 to 1971 and by American Standard from 1950 to 1973.  It appeared in a bathroom in the National Stadium for female athletes during the 1964 Summer Olympics in Tokyo.  The urinal encouraged women to urinate from a standing position, without the need to sit on a shared seat.

Supporting paragraphs: Sanistand National Stadium (Tokyo)
Answer: Sanistand