Question:  The San Francisco Fire Department provides services to a small island that was used as a what from 1934 until 1963?

Context paragraphs:
Providence Fire Department: The Providence Fire Department provides fire protection and emergency medical services to the city of Providence, Rhode Island.  The department is the largest fire department in the state of Rhode Island, and the second largest fire department in New England, after the Boston Fire Department.

Austin Fire Department: The Austin Fire Department provides fire protection and emergency medical services to the city of Austin, Texas.  The Austin Fire Department is the fourth largest fire department (by number of personnel) in the state of Texas.  In total, the department is responsible for an area of 272 sqmi and services a population of 885,400 (2013 estimate), the 11 largest city by population in the United States.

Charlotte Fire Department: The Charlotte Fire Department provides fire suppression, emergency medical services, technical rescue, hazardous materials mitigation, disaster response, code enforcement, fire investigations, and public education for the city of Charlotte, North Carolina.  The department is responsible for an area of approximately 300 sqmi with a population of over 792,000.  The Charlotte Fire Department was officially formed in 1875, the Charlotte Fire Department was officially formed, although the fire service existed for decades before that.

San Luis Obispo County Fire Department: The San Luis Obispo County Fire Department provides fire protection and emergency response services for the unincorporated areas of San Luis Obispo County, California as well as the communities of Los Osos, Pismo Beach and Avila Beach.  CAL FIRE a California state agency, functions as the Fire Department for San Luis Obispo under a contract with the County, and has done so since 1930.  The department has 180 full-time employees in the Department.  These full-time employees are supplemented by up to 100 seasonal fire fighters, 300 County paid-call and reserve fire fighters, and 120 state inmate fire fighters.

Chaires-Capitola Volunteer Fire Department: The Chaires-Capitola Volunteer Fire Department is an all volunteer fire department located in eastern Leon County, Florida.  The department provides service for the communities of Chaires and Capitola, as well as 76 sqmi of unincorporated Leon County east of Tallahassee which includes over 7,600 homes.  The department is under the administrative oversight and medical direction of Leon County Emergency Medical Services and contracts with the Tallahassee Fire Department for mutual-aid to emergencies outside of the city limits.

Hartford Fire Department: The Hartford Fire Department provides fire protection and first responder emergency medical services to the city of Hartford, Connecticut.  The Hartford Fire Department is one of four ISO Class 1-rated fire departments in New England, as well as the New Haven, Connecticut Fire Department, the Milford, Connecticut Fire Department and the Cambridge, Massachusetts Fire Department.

San Francisco Fire Department: The San Francisco Fire Department (SFFD) provides fire and emergency medical services to the City and County of San Francisco, California.  The San Francisco Fire Department, along with the San Francisco Police Department and San Francisco Sheriff's Department, serves an estimated population of 1.4 million people, which includes the approximately 850,000 citizens residing in the 47.5 sqmi of San Francisco (including Treasure Island, Yerba Buena Island, San Francisco-Oakland Bay Bridge, Golden Gate Bridge, Alcatraz Island, the San Francisco International Airport, and the Presidio of San Francisco/Golden Gate National Recreation Area.

Cincinnati Fire Department: The Cincinnati Fire Department provides fire protection and emergency medical services for Cincinnati, Ohio.  The department, which was established on April 1, 1853, was the first fully paid and professional fire department in the United States.  Along with being responsible for nearly 80 sqmi of land, the department also provides response coverage to 25 mile of Ohio River shoreline.

Alcatraz Island: Alcatraz Island ( ) is located in San Francisco Bay, 1.25 mi offshore from San Francisco, California, United States.  The small island was developed with facilities for a lighthouse, a military fortification, a military prison (1868), and a federal prison from 1934 until 1963.  Beginning in November 1969, the island was occupied for more than 19 months by a group of Native Americans from San Francisco, who were part of a wave of Native activism across the nation, with public protests through the 1970s.  In 1972, Alcatraz became part of a national recreation area and received designation as a National Historic Landmark in 1986.

Fire captain: In most American and Canadian fire services, a captain ranks above a lieutenant and below a Battalion Chief.  This varies, though, between departments – in the Boston Fire Department, the captain is the officer in overall charge of a fire company.  In the Los Angeles County Fire Department, for example, engineer is the next lowest rank below captain.  A captain is in charge of a specific fire station or specific fire company.  In the San Francisco Fire Department, for example, a captain is in charge of an Engine company, Truck company or Rescue Squad company.  In paid departments, as opposed to volunteer departments, there may be a captain for each shift at each station.  In these cases, the senior captain is responsible for the station overall.  The captain is in charge of maintaining the station, ensuring that the crew is ready to respond, checking out the apparatus, and overseeing its readiness.  The crew looks to the captain for leadership and guidance in both extreme life-threatening circumstances and during times of relaxation.  He sets the overall attitude of the crew in relationship to the department and the general public.

Supporting paragraphs: San Francisco Fire Department Alcatraz Island
Answer: federal prison