TASK DEFINITION: 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'.
PROBLEM: Passage: The next film directed by Lean was The Passionate Friends (1949), an atypical Lean film, but one which marked his first occasion to work with Claude Rains, who played the husband of a woman (Todd) torn between him and an old flame (Howard). The Passionate Friends was the first of three films to feature the actress Ann Todd, who became his third wife. Madeleine (1950), set in Victorian-era Glasgow is about an 1857 cause célèbre with Todd's lead character accused of murdering a former lover. "Once more", writes film critic David Thomson "Lean settles on the pressing need for propriety, but not before the film has put its characters and the audience through a wringer of contradictory feelings." The last of the films with Todd, The Sound Barrier (1952), has a screenplay by the playwright Terence Rattigan and was the first of his three films for Sir Alexander Korda's London Films. Hobson's Choice (1954), with Charles Laughton in the lead, was based on the play by Harold Brighouse.
 Link Information: none Question: Which film directed by Lean did better at the box office - the film released in 1949, or the film released in 1950?

SOLUTION: Answer: none

PROBLEM: Passage: Former Black Sabbath members vocalist Ronnie James Dio and drummer Vinny Appice formed Dio in October 1982 in the United States with bassist Jimmy Bain and guitarist Vivian Campbell. The band released their debut album, Holy Diver in May 1983. Since Ronnie James Dio and Jimmy Bain had played keyboards on the record, they recruited keyboardist Claude Schnell for live shows in 1983 and the following Holy Diver tour. Claude Schnell would later become a full member of Dio, and the band's first recorded effort as a quintet would be 1984's The Last in Line. The band proceeded to release Sacred Heart in 1985 and The Dio E.P. in 1986 before Campbell was fired from the band. The remaining members were joined by guitarist Craig Goldy to release Dream Evil in 1987 before the departure of Bain, Appice and Schnell. They would not play in Dio together again, however Appice would return to the band between 1993 and 1998 as well as Bain between 1999 and 2004.
 Link Information: The band released their debut album, Holy Diver in May 1983. Question: How many songs are on Dio's debut album?

SOLUTION: Answer: 9

PROBLEM: Passage: The House of Aviz, known as the Joanine Dynasty, succeeded the House of Burgundy as the reigning house of the Kingdom of Portugal. The house was founded by John I of Portugal, who was the Grand Master of the Order of Aviz. When King John II of Portugal died without an heir, the throne of Portugal passed to his cousin, Manuel, Duke of Beja. When King Sebastian of Portugal died, the throne passed to his uncle, Henry of Portugal (he might be called Henry II because Henry, Count of Portugal, father of Alphonso I of Portugal, was the first of that name to rule Portugal). When Henry died, a succession crisis occurred and António, Prior of Crato, was proclaimed António of Portugal. 
 Link Information: Sebastian ( ; 20 January 1554 – 4 August 1578) was King of Portugal from 11 June 1557 to 4 August 1578 Question: How did the reign of the king prior to Henry of Portugal last?

SOLUTION:
Answer: 21