Q: 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.
Passage: The maximum temperature recorded at the Met Eireann Weather station was on 2 August 1995. Extremes recorded at the station include the highest air temperature of on 29 June 1976, the lowest air temperature of on 2 January 1979 and the lowest ground temperature of on 12 January 1982. The maximum daily sunshine was 16.3 hours on 18 June 1978. The warmest and sunniest month on record in Kilkenny was August 1995 with a total of 274.9 hours Sunlight and very high temperatures throughout. The maximum daily sunshine was 16.3 hours on 18 June 1978. The overall trend in temperatures has been on the rise with a marked increase from 1988 onwards. Annual temperatures are running over 0.5 degrees above 20th-century levels.
Question: How many years was the time span where the highest air temperature occurred and the lowest air temperature were recorded at the Met Eireann Weather station?
Answer type: Number
A:
3.