Teacher: 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.
Teacher: Now, understand the problem? If you are still confused, see the following example:
Passage: The outbreak of the Seven Years' War in Europe in 1756 resulted in renewed conflict between French and British forces in India. The Third Carnatic War spread beyond southern India and into Bengal where British forces captured the French settlement of Chandernagore in 1757. However, the war was decided in the south, where the British successfully defended Madras, and Sir Eyre Coote decisively defeated the French, commanded by Comte de Lally at the Battle of Wandiwash in 1760. After Wandiwash, the French capital of Pondicherry fell to the British in 1761. The war concluded with the signing of the Treaty of Paris in 1763, which returned Chandernagore and Pondichery to France, and allowed the French to have "factories" in India but forbade French traders from administering them. The French agreed to support British client governments, thus ending French ambitions of an Indian empire and making the British the dominant foreign power in India.
Question: Which french settlement did the British capture first, Chandernagore or Pondicherry
Answer type: Span
Solution: Chandernagore
Reason: British captured Chandernagore in 1757 ("The Third Carnatic War spread beyond southern India and into Bengal where British forces captured the French settlement of Chandernagore in 1757") and Pondicherry in 1761 ("After Wandiwash, the French capital of Pondicherry fell to the British in 1761."). Since 1757<1761, the answer is "Chandernagore".

Now, solve this instance: Passage: However, on Tuesday, 7 February 2012, it was confirmed that Cardiff Blues would face Connacht Rugby at the Arms Park on Friday, 10 February 2012. The Pro14 League game result was a win for the Cardiff Blues 2215 and attendance of 8,000. The following Tuesday, it was announced that the match against Ulster Rugby on Friday, 17 February, would also be at the Arms Park, resulting in a Blues win, 2114 and attendance of 8,600. The agreement signed during 2009 tied Cardiff Blues to a 20-year contract to play a maximum of 18 games per season for a set fee, rather than per match at Cardiff City Stadium. But on 23 February, it was announced that the two Welsh derbies against the Scarlets and the Ospreys (rugby union) would be played at Cardiff City Stadium, rather than the Arms Park, because of Cardiff Blues anticipation that the attendance figures would far exceed the maximum capacity of 9,000. On 8 May 2012, it was announced that Cardiff Blues would be returning to the Arms Park on a permanent basis after just three years at the Cardiff City Stadium.
Question: How many years of the 20 year contract did the Cardiff Blues not play at Cardiff City Stadium?
Answer type: Number
Student:
17.