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: During the civil war, and the ensuing Soviet–Afghan War, most of the countrys infrastructure was destroyed, and normal patterns of economic activity were disrupted. The gross national product (GNP) fell substantially during Karmals rule because of the conflict; trade and transport were disrupted along with the loss of labor and capital. In 1981 the Afghan GDP stood at 154.3 billion Afghan afghanis, a drop from 159,7 billion in 1978. GNP per capita decreased from 7,370 in 1978 to 6,852 in 1981. The most dominant form of economic activity was the Agriculture in Afghanistan. Agriculture accounted for 63 percent of gross domestic product (GDP) in 1981; 56 percent of the labour force worked in agriculture in 1982. Industry accounted for 21 percent of GDP in 1982, and employed 10 percent of the labour force. All industrial enterprises were government-owned. The service sector, the smallest of the three, accounted for 10 percent of GDP in 1981, and employed an estimated one-third of the labour force. The balance of payments, which had improved in the pre-communist administration of Muhammad Daoud Khan; the surplus decreased and became a deficit by 1982, which reached minus $US70.3 million. The only economic activity that grew substantially during Karmals rule was export and import. 
Question: How many thousands of dollars did the GNP per capita decrease between 1978 and 1981? 
Answer type: Number 
518.

Passage: In the financial year ended 31 July 2011, Manchester Metropolitan University had a total income of £248,028,000 (2009/10 - £243,606,000) and a total expenditure of £213,103,000 (2009/10 - £220,221,000). The Universitys collects £106,857,000 from tuition fees and education contracts (2009/10 - £101,640,000) and attracts £4,992,000 in research grants and contracts (2009/10 - £4,414,000). Income from other sources totalled £31,371,000 (2009/10 - 30,524,000). 
Question: How many more pounds does the University collect in tuition fees and education contracts than it receives in research grants? 
Answer type: Number 
101865000.

Passage: Coming off their win over the Texans, the Eagles flew to Cowboys Stadium for a Week 14 NFC East duel with the Dallas Cowboys on Sunday night.  Philadelphia delivered the game's opening strike with a 1-yard touchdown run from quarterback Michael Vick, but the Cowboys answered with quarterback Jon Kitna completing a 1-yard touchdown pass to tight end Jason Witten.  The Eagles regained the lead in the second quarter with Vick locating offensive guard Todd Herremans on a 1-yard touchdown pass.  Afterwards, Dallas closed out the half with kicker David Buehler making a 50-yard field goal. The Cowboys took the lead in the third quarter as Buehler got a 43-yard field goal, followed by running back Felix Jones getting a 3-yard touchdown run.  Philadelphia struck back with a 39-yard field goal from kicker David Akers.  The Eagles tied the game with a 50-yard field goal from Akers, followed by Vick connecting with wide receiver DeSean Jackson on a 91-yard touchdown pass and Akers' 28-yard field goal.  Dallas tried to rally as Kitna completed a 22-yard touchdown pass to Witten, yet the Eagles held on for the victory. 
Question: How many yards difference was Michael Vick’s touchdown pass to DeSean Jackson than Jon Kitna’s first touchdown pass to Jason Witten? 
Answer type: Number 

90.