In this task, you're given a passage, further information available on a particular linked term from the statement, and a question. Your job is to generate the answer to the question by using the information provided. If there is no clear answer obtainable, output 'none'.

[EX Q]: Passage: Watson graduated in 1943 with BS in electrical engineering from Iowa State College. From 1943 to 1946 he was a researcher at the United States Naval Research Laboratory in Washington, D.C. During his work for the U.S. Navy he went to night school at George Washington University. He graduated from the University of Iowa with Ph.D. in 1948 with thesis The polarizability of the meson-charge cloud of a neutron in an external electrostatic field. He was from 1948 to 1949 an Atomic Energy Commission (AEC) Fellow at the Institute for Advanced Study and from 1949 to 1951 an AEC Fellow at the Berkeley Radiation Laboratory. He was from 1951 to 1954 an assistant professor of physics at Indiana University and from 1954 to 1957 an associate professor of physics at the University of Wisconsin, Madison. In 1953 he was elected a fellow of the American Physical Society. From 1957 to 1981 he was a staff member of Lawrence Berkeley National Laboratory, as well as a professor of physics at the University of California, Berkeley. In 1974 he was elected a member of the National Academy of Sciences. From 1981 to 1991 he was the director of the Marine Physical Laboratory, Scripps Institute of Oceanography, as well as a professor of physical oceanography at the University of California, San Diego. In 1991 he retired as professor emeritus. His doctoral students include Shang-keng Ma.
 Link Information: 

The National Academy of Sciences Building is located at 2101 Constitution Avenue, in northwest Washington, D.C.; Question: Where is the organization to which Watson was elected in 1974 headquartered? 
[EX A]: Answer: Washington, D.C

[EX Q]: Passage: As part of the RAAF's reorganisation following the outbreak of World War II in September 1939, No. 2 Group was formed in Sydney on 20 November; Charlesworth was appointed its Senior Air Staff Officer (SASO). He continued to serve in this position when the group was re-formed as Central Area in March 1940. Posted to Western Australia to take command of RAAF Station Pearce in August, he was promoted to temporary group captain on 1 September 1940. He became Senior Administration Officer at the newly established Western Area, Perth, in January the following year. In September 1942, Charlesworth took over No. 2 Bombing and Gunnery School in Sale, Victoria. He handed over to Group Captain Charles "Moth" Eaton in August 1943, before briefly taking charge of RAAF Headquarters Forward Echelon in Brisbane. Charlesworth was appointed Air Officer Commanding (AOC) Eastern Area, headquartered at Bradfield Park, Sydney, in December 1943. Eastern Area was responsible for maritime patrol and anti-submarine warfare off the coast of New South Wales and southern Queensland. Japanese submarine activity had decreased in the months prior to Charlesworth taking command, and he was concerned that Allied ships were becoming complacent. He observed "a general slackening off in procedure; ships are seldom where they should be, and a minority of merchant ships identify themselves to aircraft". The RAAF's patrols had also settled into a predictable pattern that would have been easy for an observant submarine captain to avoid.
 Link Information: none Question: How many groups were stationed at RAAF Station Pearce in August 1940 when Charlesworth was in command?
[EX A]: Answer: none

[EX Q]: Passage: Gerard "Ged" Keegan (born 3 October 1955 in Bradford, West Riding of Yorkshire) is an English former footballer who played as a right-back. He joined Manchester City as a trainee in 1973 and made his debut in March 1975 in a 2–1 defeat against Carlisle United. He made a total of 37 Football League appearances for the club, scoring two goals. However his most memorable game for them was in their 1976 Football League Cup Final victory. He also played in the first ever England under-21 match. In 1978, he was transferred to Oldham Athletic where he made 144 League appearances (scoring 5 goals) before moving to Mansfield Town in 1983. After a short spell here he moved on to Rochdale, and then to Altrincham. As of 2008 he was working as a car-parking attendant at Manchester Airport.
 Link Information: Construction started on 28 November 1935 and the airport opened partly in June 1937 Question: How long had Manchester Airport been in operation for the year Keegan made his debut?
[EX A]:
Answer: 38