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.

[EX Q]: 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 
[EX A]: 6.

[EX Q]: Passage: Hoping to rebound from their road loss to the Falcons, the Lions played their Week 2 home opener against their NFC North foe, the Green Bay Packers. In the first quarter, Detroit trailed as Packers QB Aaron Rodgers completed a 9-yard TD pass to WR James Jones.  In the second quarter, the Lions continued to trail as Rodgers completed a 2-yard TD pass to WR Donald Driver and a 29-yard TD pass to WR Jordy Nelson.  Detroit closed out the first half when kicker Jason Hanson nailed a 38-yard field goal. In the third quarter, the Lions continued to hack away at Green Bay's lead with Hanson kicking 49-yard and then 53-yard field goals. The Packers responded when kicker Mason Crosby nailed a 25-yard field goal. In the fourth quarter, Detroit clawed away at the Pack's lead when QB Jon Kitna completed a 38-yard TD pass to WR Calvin Johnson. The Lions closed in as the snap to Packers punter Derrick Frost was high, causing it to go through the back of his end zone, giving Detroit a safety. The Lions took the lead on Kitna's 47-yard TD pass to Calvin Johnson.  However, Green Bay rebounded with Crosby's 39-yard field goal, RB Brandon Jackson's 19-yard TD run, CB Charles Woodson's 41-yard interception return for a touchdown, and safety Nick Collins' 42-yard interception return for a touchdown. 
Question: How many field goals were kicked during the game? 
Answer type: Number 
[EX A]: 5.

[EX Q]: Passage: Normandy added a new front in the war and the threat of another invasion attempt across the channel. In 1590, the Spanish landed a considerable force in Brittany to assist the French Catholic League, expelling the English and Huguenot forces from much of the area. Henry IV's conversion to Catholicism in 1593 won him widespread French support for his claim to the throne, particularly in Paris , a city that he had unsuccessfully besieged in 1590. However, in 1594 Anglo-French forces were able to end Spanish hopes of using the large port of Brest as a launching point for an invasion of England by capturing Fort Crozon. The French civil war turned increasingly against the hardliners of the French Catholic League. With the signing of the Triple Alliance in 1596 between France, England and the Dutch, Elizabeth sent a further 2,000 troops to France after the Spanish took Calais. In September 1597 Anglo-French forces under Henry retook Amiens, just six months after the Spanish took the city, bringing to a halt a string of Spanish victories. The first tentative talks on peace had already begun before the battle. The League hardliners started to lose  ground and popular support throughout France to a resurgent Henry. In addition Spanish finances were at breaking point because of fighting wars in France, the Netherlands and against England. Therefore, a deeply ill Philip decided to end his support for the League and to finally recognize the legitimacy of Henry's accession to the French throne. Without Spanish support the last League hardliners were quickly defeated. In May 1598, the two kings signed the Peace of Vervins ending the last of the religious civil wars and the Spanish intervention with it. 
Question: How many different wars were fought? 
Answer type: Number 
[EX A]:
3.