instruction:
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.
question:
Passage: Salks vaccine was then used in a test called the Francis Field Trial, led by Thomas Francis, Jr., the largest medical experiment in history at that time. The test began with about 4,000 children at Franklin Sherman Elementary School in McLean, Virginia, and eventually involved 1.8 million children, in 44 states from Maine to California. By the conclusion of the study, roughly 440,000 received one or more injections of the vaccine, about 210,000 children received a placebo, consisting of harmless culture media, and 1.2 million children received no vaccination and served as a control group, who would then be observed to see if any contracted polio. The results of the field trial were announced 12 April 1955 (the tenth anniversary of the death of President Franklin D. Roosevelt, whose Franklin D. Roosevelts paralytic illness was generally believed to have been caused by polio). The Salk vaccine had been 60-70% effective against PV1 (poliovirus type 1), over 90% effective against PV2 and PV3, and 94% effective against the development of bulbar polio. Soon after Salks vaccine was licensed in 1955, childrens vaccination campaigns were launched. In the U.S, following a mass immunization campaign promoted by the March of Dimes, the annual number of polio cases fell from 35,000 in 1953 to 5,600 by 1957. By 1961 only 161 cases were recorded in the United States.
Question: How many states chose not to particpate in the Salks vaccine?
Answer type: Number
answer:
6.

question:
Passage: During the civil war, and the ensuing SovietAfghan 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
answer:
518.

question:
Passage: The Patriots faced the Jets at the Meadowlands in a rematch of their thrilling 29-26 overtime win a few weeks earlier, but this game would be anything but thrilling. After both teams punted on their opening drive, Edelman gave the Patriots decent field position with a 30-yard return to the Patriots 36. The Patriots drove to the Jets 21, but Gostkowski missed the 39-yard field goal. Starting at their own 30, the Jets drove to the Patriots 23, but Sanchez was intercepted by Gregory at the Patriots 15. The Patriots proceeded to march 84 yards in 15 plays, scoring on the first play of the second quarter. After driving to the Patriots 31, Shonn Greene fumbled Gregory recovering at the Patriots 19. Brady dumped off a short pass to Vereen out of the backfield, who ran untouched down the sideline 83 yards for a touchdown, increasing the Patriots lead to 14-0. On the second play of the Jets next drive, Sanchez ran up the middle, but ran into his offensive line and fumbled (creating the infamous butt fumble) with Gregory returning it 32 yards for a touchdown, giving the Patriots a 21-0 lead. Joe McKnight fumbled the ensuing kickoff right into the hands of Edelman, who returned it 22 yards for a touchdown, giving the Patriots a 28-0 lead. The Jets drove 41 yards to their own 43, but Mayo sacked Sanchez for a 9-yard loss and the Jets punted. The Patriots raced 73 yards in just 4 plays, scoring on a 56-yard touchdown bomb to Edelman, giving the Patriots a 35-0 lead. The Jets drove to the Patriots 14 and Folk got the Patriots on the board with a 32-yard field goal. For the second week in a row, the Patriots tied a franchise record set in their 2009 Week 6 game against the Tennessee Titansin this case, 35 second-quarter points, including three touchdown in 52 seconds. Unlike the Titans game, though, where the Patriots held the ball for 9 minutes and 22 seconds, in this quarter the Patriots held the ball for just 2 minutes and 14 seconds, with the offense running just six plays in the entire quarter. After a Jets punt, the Patriots drove to the Jets 46, but Edelman fumbled with LaRon Landry recovering at the Jets 43. The Jets drove to the Patriots 1-yard line, but Greene was stuffed for no gain on 4th-and-1. A penalty for a chop-block on Ridley in the end zone led to a safety, making the score 35-5 and giving the Jets the ball. The Jets marched 71 yards in 4 plays, scoring on a 4-yard touchdown run by Bilal Powell, making the score 35-12. The Patriots countered with a 17 play, 86-yard marathon, taking seven-and-a-half minutes off the clock and scoring on Brady's 1-yard touchdown run a few minutes into the fourth quarter. On the Jets next drive, Sanchez hit Chaz Schilens for a 22-yard gain to the Jets 45, but Dennard forced him to fumble at the 40 with Ninkovich returning it to the Jets 37. A 28-yard completion to Welker and a 9-yard run by Ridley gave the Patriots a 49-12 lead. Two possessions later, Sanchez hit Keller for a 1-yard touchdown. After a Patriots punt, the Jets ran out of the rest of the clock and the Patriots won the game. The Patriots scored three touchdowns in a span of 52 seconds, becoming the third team since the AFL-NFL merger to do so. (The 2002 Seahawks did it in 52 seconds while the 1998 Falcons in 49 seconds.) Also, the Patriots scored the most points in consecutive weeks (108) and in a four-week period (190) since the 1950 Los Angeles Rams.
Question: How many points did the Patriots score in the first half?
Answer type: Number
answer:
35.