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'.

Q: Passage: The construction of the cathedral was approved in 1894 by the Ministry of Internal Affairs under Tsarist Russia. Groundbreaking was in 1899; construction work began in 1901 and was completed ten years later. Three-aisled and built from red brick, the cathedral is based on a design by architect Tomasz Bohdanowicz-Dworzecki. The style was influenced by Westminster Abbey and Milan Cathedral. With the help of funds from Catholic parishes in Russia and its neighbouring states, the church was consecrated as a chapel for Moscow's Polish parish in 1911. In the aftermath of the Russian Revolution in 1917, the Provisional Government was overthrown by the Bolsheviks and Russia eventually became part of the Soviet Union in 1922. Because the promotion of state atheism was a part of Marxist–Leninist ideology, the government ordered many churches closed; the cathedral was closed in 1938. During World War II, it was threatened with demolition, and was used after the war for civil purposes, as a warehouse and then a hostel. Following the fall of communism in 1991, it returned to being a church in 1996. In 2002 it was elevated to the status of cathedral. Following an extensive and costly programme of reconstruction and refurbishment, the cathedral was reconsecrated in 2005.
 Link Information: The State Duma was the more representative chamber out of the two in the Russian parliament established after the Revolution of 1905, and was led first in the new post-Czarist era by Prince Georgy Lvov (18611925) Question: Who was the head of the Provisional Government when it was overthrown by the Bolsheviks to form the Soviet Union?

A: Answer: Prince Georgy Lvov
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Q: Passage: Sussex has a centuries-long tradition of sport. Sussex has played a key role in the early development of both cricket and stoolball. Cricket is recognised as having been formed in the Weald and Sussex CCC is England's oldest county cricket club. Slindon Cricket Club dominated the sport for a while in the 18th century. The cricket ground at Arundel Castle traditionally plays host to a Duchess of Norfolk's XI which plays the national test sides touring England. The sport of stoolball is also associated with Sussex, which has a claim to be where the sport originated and certainly where its revival took place in the early 20th century. Sussex is represented in the Football League by Brighton & Hove Albion and Crawley Town. Brighton has been a League member since 1920, whereas Crawley was promoted to the League in 2011. Sussex has had its own football association, since 1882 and its own football league, which has since expanded into Surrey, since 1920. In horse racing, Sussex is home to Goodwood, Fontwell Park, Brighton and Plumpton. The All England Jumping Course show jumping facility at Hickstead is situated north of Brighton and Hove.
 Link Information: The course was the first permanent showground for equestrian sport in the country, opening in 1960 Question: When was the facility at Hickstead situated north of Brighton and Hove constructed?

A: Answer: 1960
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Q: Passage: "Enjoy Yourself" is a song recorded by The Jacksons and released as a single in 1976. Featuring Michael and Jackie Jackson on lead vocals, it was the first non-Motown single for the group since they departed from the label earlier that year. The song peaked at #6 on the Billboard Hot 100 chart on February 19, 1977. On other US charts, "Enjoy Yourself" peaked at #2 on the Hot Soul Singles chart, and #33 on the National Disco Action Top 40 chart. On February 14, 1989, it became the group's first single to be certified Platinum by the RIAA. It was also the group's first song to feature new member Randy Jackson, who replaced Jermaine when he decided to stay at Motown after his brothers left. The song is sampled on the track "Let's Have a Party" by the Backstreet Boys, which appears on their 1996 self-titled debut album. The song is credited to Philadelphia songwriters/producers Gamble and Huff; however, a session musician from Gamble and Huff’s in-house band recalled that the late guitarist T.J. Tindall wrote the riff that was the initial spark for the song.
 Link Information: Reflecting growth in record sales, the Platinum award was added in 1976, for albums able to sell one million units, and singles selling two million units. Question: How many sales are required to get the certification from the RIAA that Enjoy Yourself recieved in 1989?

A:
Answer: for albums able to sell one million units, and singles selling two million units
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