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'.

Passage: Keith Cerny is an American opera director and businessman. From 2004-2007 he was Executive Director and CFO of the San Francisco Opera and from 2010-2018 he was General Director of the Dallas Opera. In 2018 he was appointed General Director of the Calgary Opera. He is also the former CEO of Sheet Music Plus (2008-2010), the world's largest interest-based sheet-music company. He is a graduate of the University of California, Berkeley (B.A. in Music and B.S. in Physics), the Harvard Business School (M.B.A.), and the Open University in the United Kingdom (Ph.D. in Economic Development Studies/Econometrics). He also studied conducting, voice, and accompanying at the Guildhall School of Music and Drama in London and studied opera-accompanying in English National Opera's répétiteur training course. He also worked for McKinsey & Company for six years where he was a Senior Engagement Manager, and seven years with the consulting firm Accenture. He is also an Executive Board Member for Opera America.
 Link Information: The school was established in 1908.  Question: When did the school Cerny got his M.B.A. open?

Answer: 1908

Passage: The 2003–04 NBA season was the 34th season for the Portland Trail Blazers in the National Basketball Association. After years of off the court troubles and playoff underachieving, the Blazers under new General Manager John Nash, decided to rebuild. Throughout the season, the Blazers dealt away talented but troubled stars like trading Bonzi Wells, after losing his co-captain title, to the Memphis Grizzlies in November, and trading Rasheed Wallace to the Atlanta Hawks for Shareef Abdur-Rahim and Theo Ratliff in February. However, after appearing in only one game with the Hawks, Sheed was again traded to the Detroit Pistons for the rest of the season. The Pistons would eventually win the NBA Finals of that year, giving Wallace his first championship. The team also sent Jeff McInnis to the Cleveland Cavaliers for Darius Miles.
 Link Information: none Question: Which team that Bonzi Wells played for in the 2003-04 season had the best record?
Answer: none

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: On 3 September 1939, Britain declared war when its ultimatum for Germany to withdraw from Poland expired. Question: How many years did World War II last?

Answer: 6