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: By the 1920s, SCGX was doubling annually and had emerged as the "fastest growing grain market in the world"; transacting 22 million bushels in 1928 (valued at $336 million in 2018), resulting from its location in the heart of the Corn Belt and self-imposed standards before the Grain Standards Act of 1916 including species admittance and non-mixing. However, its growth was limited by shipping rates. With the trucking industry and Interstate Highway System not yet developed, SCGX was constrained by monopolized railroad rates, primarily by the Great Northern Railway. Exhausting their bargaining power with the Interstate Commerce Commission, SCGX President Charles C. Flanley directed future lobbying efforts to unlocking barge navigation of the Missouri River. His initiative was stalled throughout the 1930s by the Great Depression and Dust Bowl. In 1938, a renewed thirteen year campaign led by Secretary William Henry Marriott finally opened commercial navigation of the Missouri River and helped establish the Missouri River Basin Project, which included development of the Gavins Point Dam. The alternate transportation succeeded in breaking the railroad's monopoly. By the 1970s, SCGX was among the largest exchanges in the world; transacting over 100 million bushels annually (valued at $1 billion as of 2018).
 Link Information: The dam and hydroelectric power plant were constructed as the Gavins Point Project from 1952 to 1957 by the United States Army Corps of Engineers as part of the Pick-Sloan Plan Question: When was the dam that was part of the Missouri River Basin Project completed?
[EX A]: Answer: 1957

[EX Q]: Passage: Born in Richmond, California, Pro received an Associate of Arts degree from Contra Costa Community College in 1966, a Bachelor of Arts degree from San Francisco State University in 1968, and a Juris Doctor from Golden Gate University School of Law in 1972. He served in the United States Naval Reserve from 1964 to 1968. After serving as a law clerk to Judge William P. Compton of the Eighth Judicial District Court of Nevada from 1972 to 1973, Pro worked as a deputy public defender in Las Vegas, Nevada from 1973 to 1975. He was an Assistant United States Attorney in Las Vegas from 1975 to 1978. He was in private practice in Reno, Nevada from 1978 to 1979. He was a deputy state attorney general of Nevada from 1979 to 1980. He was the Chief Assistant United States Attorney in Reno in 1980. He served as a United States Magistrate Judge of the United States District Court for the District of Nevada from 1980 to 1987.
 Link Information: none Question: Who was the next to serve in the same role as Pro directly after his 1975 to 1978 tenure in the office? 
[EX A]: Answer: none

[EX Q]: Passage: The Rifles' first official release was a 7" demo of "Peace & Quiet" released by Blow Up Records. The band switched to fellow independent label Xtra Mile Recordings for their May 2005 release of the single "When I'm Alone", which would go on to reach number 64 in the UK charts. Later that year the band's next single "Local Boy" would be released via Right Hook Recordings. It would get airplay on the Saturday morning show Soccer AM and would help give the band more exposure and even help them become regular guests on the show. The Rifles released two singles, "Repeated Offender" and "She's Got Standards", ahead of the 17 July release of their debut album No Love Lost, which peaked at 26 in the UK charts. The band toured in 2006, and performed at A Campingflight to Lowlands Paradise 2007 and Paaspop Schijndel 2007, two music festivals in the Netherlands. The Rifles launched their European tour to promote their new album including a gig at the Forum, London, at which Paul Weller (The Jam) appeared on stage to play the song "She's the Only One" with the band, and The Jam's single, "The Eton Rifles". The Rifles then released a free download of the song "No Love Lost" a year after their album of the same name was released.
 Link Information: "Peace And Quiet", The Rifles (March 2005) Question: How many years before their switch to Xtra Mile Recordings did The Rifles release "Peace & Quiet"?
[EX A]:
Answer: 2