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: Coming off their bye week, the Steelers flew to Arrowhead Stadium for a Week 12 Sunday night showdown with the Kansas City Chiefs. Pittsburgh trailed early in the first quarter when Chiefs kicker Ryan Succop kicked a 41-yard field goal. Pittsburgh would answer in the second quarter with a 21-yard field goal from kicker Shaun Suisham following a Chiefs goal-line stand. The Steelers struck again when quarterback Ben Roethlisberger threw a 2-yard touchdown pass to rookie tight end Weslye Saunders. Succop and Shuisham each made 49-yard field goals before the end of the half to make it 13-6. The third quarter was scoreless, but in the 4th quarter Kansas City pulled closer when Succop booted a 40-yarder. This pulled the Chiefs to within 13-9. However, Pittsburgh's defense held on to preserve the victory as cornerback Keenan Lewis sealed the deal with an interception late in the 4th quarter with 29 seconds remaining.
Question: How many points were scored in the first half?
Answer type: Number
19.

Passage: The 49ers would score touchdowns on each of three Cowboys turnovers, all before halftime. Even though the Cowboys held a significant edge in 1st quarter time of possession (13:26 to 1:34), the 49ers had a 21-3 lead due to the turnovers. With the 49ers up 28-3, the Cowboys would find themselves with their largest halftime deficit in a home opener ever. Although the 49ers would not score again in the second half, they would only hold the Cowboys to 14 more points, and win the game.
Question: how many points did the niners lead by?
Answer type: Number
21.