TASK DEFINITION: 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.
PROBLEM: Passage: The earliest human remains found on the island of Sri Lanka date to about 35,000 years ago . The proto-historical period begins roughly in the 3rd century, based on chronicles like the Mahavamsa, Dipavamsa, and the Culavamsa. The earliest documents of settlement in the Island are found in these chronicles. These chronicles cover the period since the establishment of the Kingdom of Tambapanni in the 6th century BCE. The first Sri Lankan ruler of the Anuradhapura Kingdom, Pandukabhaya, is recorded for the 4th century BCE. Buddhism was introduced in the 3rd century BCE by Arhath Mahinda . The first Tamil ruler of the Anuradhapura Kingdom, Ellalan, an invader, is recorded for the 2nd century BCE. The island was divided into numerous kingdoms over the following centuries, intermittently  united under Chola rule. Sri Lanka was ruled by 181 monarchs from the Anuradhapura to Kandy periods.From the 16th century, some coastal areas of the country were also controlled  by the Portuguese, Dutch and British.Between 1597 and 1658, a substantial part  of the island was under Portuguese rule. The Portuguese lost their possessions in Ceylon due to Dutch intervention in the Eighty Years' War. Following the Kandyan Wars, the island was united under British rule in 1815.Armed uprisings against the British took place in the 1818 Uva Rebellion and the 1848 Matale Rebellion. Independence was finally granted in 1948 but the country remained a Dominion of the British Empire until 1972. In 1972 Sri Lanka assumed the status of a Republic. A constitution was introduced in 1978 which made the Executive President the head of state. The Sri Lankan Civil War began in 1983, including an armed youth uprising in 1971 and 1987-1989, with the 25-year-long civil war ending in 2009. 
Question: How many years apart was the the two armed youth uprising in 1971 and 1987>? 
Answer type: Number 

SOLUTION: 16.

PROBLEM: 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 

SOLUTION: 6.

PROBLEM: Passage: The Bears fought to continue their playoff chances against the Arizona Cardinals, with a loss knocking the Bears out of contention. Jay Cutler began the game having his first six passes fall incomplete, though he ended the game completing 12 of 26 for 146 yards and a touchdown. The Bears started the game on a strong note when Cardinals running back Beanie Wells fumbled the ball, and was recovered by Zack Bowman in the end zone, giving the Bears the lead. Arizona then settled for Jay Feely's 49-yard field goal. On the following drive, Matt Forte broke free for a 36-yard run, followed by Brandon Marshall's 30-yard catch reaching the Cardinals 4-yard line, where Forte ran in untouched to increase the score to 14-3. The Cardinals later tried a fake field goal instead of attempting a 50-yard field goal, but failed. Later in the game, D. J. Moore muffed Dave Zastudil's punt, which was recovered by Arizona's Michael Adams. However, the Cardinals were only able to get a field goal. On Chicago's final possession of the first half, Cutler completed all of his passes, and the Bears scored on Cutler's 11-yard pass to Marshall. In the second half, Charles Tillman intercepted Ryan Lindley, and had the pick returned 10-yards for a touchdown. The interception return is the eighth by the team, one shy of the NFL record. Lindley was later replaced by Brian Hoyer, who was also ineffective, having a pass intercepted by Kelvin Hayden, who took it 39 yards to the Arizona 10. The Bears failed to take advantage of the interception, as Olindo Mare's field goal was blocked by Adrian Wilson, which was recovered by Justin Bethel, who returned the blocked kick 82 yards for the Cardinals lone touchdown. With the win, the Bears kept their playoff hopes alive, as their record improved to 9-6. In order for the Bears to qualify for the playoffs, they must defeat the Lions in Week 17, while having the Packers defeat the Vikings. 
Question: how many points did forte increase the score by? 
Answer type: Number 

SOLUTION:
14.