This task involves creating answers to complex questions, from a given passage. Answering these questions, typically involve understanding multiple sentences. Make sure that your answer has the same type as the "answer type" mentioned in input. The provided "answer type" can be of any of the following types: "span", "date", "number". A "span" answer is a continuous phrase taken directly from the passage or question. You can directly copy-paste the text from the passage or the question for span type answers. If you find multiple spans, please add them all as a comma separated list. Please restrict each span to five words. A "number" type answer can include a digit specifying an actual value. For "date" type answers, use DD MM YYYY format e.g. 11 Jan 1992. If full date is not available in the passage you can write partial date such as 1992 or Jan 1992. If you find multiple spans, please add them all as a comma separated list. Please restrict each span to five words.

Passage: The size of the indemnity had been the hardest factor to accept for the Tibetan negotiators. The Secretary of State for India, St John Brodrick, had in fact expressed the need for it to be "within the power of the Tibetans to pay" and given Younghusband a free hand to be "guided by circumstances in this matter". Younghusband raised the indemnity demanded from 5,900,000 to 7,500,000 rupees, and further demanded the right for a British trade agent, based at Gyantse, to visit Lhasa "for consultations". It seems that he was still following Lord Curzon's geo-political agenda to extend British influence in Tibet by securing the Chumbi Valley for Britain.  Younghusband wanted the payment to be met by yearly instalments; it would have taken about 75 years for the Tibetans to clear their debt, and since British occupation of the Chumbi valley was surety until payment was completed, the valley would remain in British hands. Younghusband wrote to his wife immediately after the signing; "I have got Chumbi for 75 years. I have got Russia out for ever". The regent commented that "When one has known the scorpion  the frog  is divine". The Amban later publicly repudiated the treaty, while Britain announced that it still accepted Chinese claims of authority over Tibet. Acting Viceroy Lord Ampthill reduced the indemnity by two-thirds and considerably eased the terms in other ways. The provisions of this 1904 treaty were revised in the Anglo-Chinese Convention of 1906. The British, for a fee from the Qing court, also agreed "not to annex Tibetan territory or to interfere in the administration of Tibet", while China engaged "not to permit any other foreign state to interfere with the territory or internal administration of Tibet". 
Question: How many years were between the 1904 treaty and its revision? 
Answer type: Number 
2.

Passage: Fresh off their divisional home win over the Bears on Sunday night, the Vikings flew to Ford Field for a Week 14 NFC North rematch with the winless Detroit Lions. Late in the first quarter, Minnesota would trail as Lions kicker Jason Hanson got a 25-yard field goal. In the second quarter, Detroit increased its lead as Hanson got a 23-yard field goal. The Vikings closed out the half with a 35-yard field goal from kicker Ryan Longwell. In the third quarter, Minnesota would take the lead as RB Chester Taylor got a 17-yard TD run. The Lions would reply with QB Daunte Culpepper (a former Viking) completing a 70-yard TD pass to wide receiver Calvin Johnson. In the fourth quarter, the Vikings regained the lead as QB Tarvaris Jackson completed an 11-yard TD pass to TE Visanthe Shiancoe. Detroit tried to rally as Hanson nailed a 39-yard field goal, yet Longwell helped Minnesota pull away with a 50-yard field goal, his fifth 50+ yarder of the season. 
Question: How many yards was the shortest field goal of the first half? 
Answer type: Number 
23.

Passage: Until 1998, Shearer was paid $30,000 per episode. During a pay dispute in 1998, Fox threatened to replace the six main voice actors with new actors, going as far as preparing for casting of new voices. The dispute, however, was resolved and Shearer received $125,000 per episode until 2004, when the voice actors demanded that they be paid $360,000 an episode. The dispute was resolved a month later, and Shearers pay rose to $250,000 per episode. After salary re-negotiations in 2008, the voice actors received $400,000 per episode. Three years later, with Fox threatening to cancel the series unless production costs were cut, Shearer and the other cast members accepted a 30 percent pay cut, down to just over $300,000 per episode. On May 13, 2015, Shearer announced he was leaving the show. After the other voice actors signed a contract for the same pay, Shearer refused, stating it was not enough. Al Jean made a statement from the producers saying "the show must go on," but did not elaborate on what might happen to the characters Shearer voiced. On July 7, 2015, Shearer agreed to continue with the show, on the same terms as the other voice actors. 
Question: What year did Fox threaten to cancel the series unless production costs were cut? 
Answer type: Date 

{'day': '', 'month': '', 'year': '2011'}.