Question: How many staff members were taken hostage during the prision riot that David Rothenberg was a civilian observer of?

Context paragraphs:
David Rothenberg (activist): David Rothenberg is a veteran Broadway producer and prisoners' rights activist.  After reading the script for Fortune and Men's Eyes by former prisoner and playwright John Herbert, he was instrumental in producing the play for an off-Broadway production.  Later, he was a civilian observer during the Attica Prison riot which left a deep impression on him and spurred his lifelong activism for prisoner's rights.  This inspired him to found the Fortune Society organization that seeks to advocate for prisoner's rights and works with former inmates to aid them in adjusting to life after prison.  David Rothenberg is an agnostic and lives on the Upper West Side of New York, NY.

Richard Morefield: Richard Henry Morefield (September 9, 1929 – October 11, 2010) served in the United States Foreign Service and was one of the 66 staff members at the American embassy in Teheran who were taken captive by a militant Islamist student group called the Muslim Student Followers of the Imam's Line on November 4, 1979, as part of what became known as the Iran hostage crisis.  He was one of 52 Americans who were held as a hostage for 444 days, until negotiations for the remaining captives being held hostage were concluded with the signing of the Algiers Accords on January 19, 1981, with their release coming the following day.

Fortune Society: The Fortune Society is a New York City-based non profit organization that provides essential support to the formerly incarcerated.  Some of the services offered include help with finding housing and jobs, adjusting to civilian life and educational opportunities.  It was founded by David Rothenberg in 1967 as a result of his experience at Rikers while researching for the play "Fortune and Men's Eyes".

Classified Records: Classified Records was an independent record label based in San Francisco, CA that released music from recording artists Jocelyn Enriquez, Pinay, Julie Plug, M:G, Drop n Harmony, as well as the Serenade compilation series.  The label was founded by Kormann Roque, Elvin Reyes, and Rino Que in 1993.  Classified Records was well known within the Filipino community since many staff members and recording artists were of Filipino descent.

Armenian Egyptology Centre: Egyptology and the Armenian Egyptology Centre (AEC) were both simultaneously created in Armenia on December 25, 2006 under the initiative of director, Dr. Christian Tutundjian de Vartavan, with the support of Prof. Aram Simonyan rector of the university, as well as many personalities of Armenian science and education.  Proposal validated, as per the rules of university, by an historic unanimous vote of the High Scientific Committee of Yerevan State University in the Spring of 2007, with over 60 members present.  The centre is composed of three full-time staff member with a fourth one in the process of integration.  Staff members are handpicked for their personal and professional qualities, of which stable dedication is a primary one.Two staff members have already published under their own name and the other two are preparing their first Egyptology articles which should appear within the next few months.  At that point it will be considered that the Armenian school of Egyptology will be born, particularly as some staff members will also start teaching various subjects within different frames.

Fremantle Prison riot: The Fremantle Prison riot was a prison riot that occurred on 4 January 1988 at Fremantle Prison, in Western Australia.  The riot was organised as a diversion for an escape that was to take place.  Prisoners created a fire as part of the diversion, and temperatures inside the cells were recorded at 52.2 °C (126 °F).  3 division and 4 division were taken over by a total of seventy prisoners, and 5 officers were taken hostage.  The fire caused $1.8 million in damage and unintentionally prevented the planned escape.

Rothenberg propriety: In diatonic set theory, Rothenberg propriety is an important concept, lack of contradiction and ambiguity, in the general theory of musical scales which was introduced by David Rothenberg in a seminal series of papers in 1978.  The concept was independently discovered in a more restricted context by Gerald Balzano, who termed it "coherence".

Spaghetti House siege: The Spaghetti House siege began on the late evening of 28 September 1975, at the Spaghetti House restaurant in Knightsbridge, London.  Franklin Davies, a Nigerian student, led two other gunmen, Anthony Munroe and Wesley Dick, in an attempted armed robbery of the Spaghetti House, where managers of the chain had assembled to pay in the week's takings of approximately £13,000.  When the armed robbery did not go to plan, nine Italian staff members were taken hostage, and moved into the basement.  Another staff member escaped and raised the alarm, leading to a siege of six days.

New Mexico State Penitentiary riot: The New Mexico State Penitentiary riot, which took place on February 2 and 3, 1980, in the state's maximum security prison south of Santa Fe, was one of the most violent prison riots in the history of the American correctional system: 33 inmates died and more than 200 inmates were treated for injuries.  None of the 12 officers taken hostage were killed, but seven suffered serious injuries caused by beatings and rapes.  This was the third major riot at the NM State Penitentiary, the first occurring on 19 July 1922 and the second on 15 June 1953.

Attica Prison riot: The Attica Prison riot, also known as the Attica Prison rebellion or Attica Prison uprising, occurred at the Attica Correctional Facility in Attica, New York, United States in 1971.  Based upon prisoners' demands for better living conditions and political rights, the riot was one of the most well-known and significant uprisings of the Prisoners' Rights Movement.  On September 9, 1971, two weeks after the killing of George Jackson at San Quentin State Prison, about 1,000 of the Attica prison's approximately 2,200 inmates rioted and took control of the prison, taking 42 staff hostage.

Supporting paragraphs: David Rothenberg (activist) Attica Prison riot
Answer: 42