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.

Example Input: Passage: Macquarie University (MQ) world rankings includes it being number 240 on the QS rankings, number 251+ on Times (THE), number 151+ on ARWU, and  number 267 with US News. This contributes to Macquarie being the number 8 ranked Australian university overall in the world ranking systems. Macquarie University rankings within Australia include being placed at number 8 on the ERA scale (2012) and being a 4 1/2 Star AEN rated university. Macquarie also has a student survey satisfaction rating of 77.4% for business, 90.3% for health, 91.4% for arts, and 93.8% for science. Macquarie is ranked in the top 40 universities in the Asia-Pacific region and within Australias top 12 universities according to the Academic Ranking of World Universities, the U.S. News & World Report Rankings and the QS World University Rankings. Macquarie was the highest ranked university in Australia under the age of 50 and was ranked 18th in the world (prior to its golden jubilee in 2014), according to the QS World University Rankings. 
Question: How many points higher is the US News ranking of MQ University is the ranking given to MQ University by US News? 
Answer type: Number 
Example Output: 27.

Example Input: Passage: 2000 Based on the 2000 United States Census, there were 242,820 people, 98,782 households, and 59,269 families residing in the city. The population density was 1,619.7 people per square mile (625.4/km2). There were 111,927 housing units at an average density of 746.6 per square mile (288.3/km2). The racial makeup of the city was 62.46% African American, 35.07% White American, 0.17% Indigenous peoples of the Americas, 0.80% Asian American, 0.04% Pacific Islander, 0.62% from Race (United States Census), and 0.83% from Multiracial American. 1.55% of the population were Hispanic or Latino American of any race. 
Question: How many in percent from the census weren't White American? 
Answer type: Number 
Example Output: 64.93.

Example Input: 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 
Example Output:
6.