You will be given a definition of a task first, then some input of the task.
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: At the University of Arizona, where records have been kept since 1894, the record maximum temperature was on June 19, 1960, and July 28, 1995, and the record minimum temperature was on January 7, 1913. There are an average of 150.1 days annually with highs of or higher and an average of 26.4 days with lows reaching or below the freezing mark. Average annual precipitation is . There is an average of 49 days with measurable precipitation. The wettest year was 1905 with and the driest year was 1924 with . The most precipitation in one month was in July 1984. The most precipitation in 24 hours was on October 1, 1983. Annual snowfall averages . The most snow in one year was in 1987. The most snow in one month was in January 1898 and March 1922.
Question: How many years after the wettest year did the driest year happen?
Answer type: Number
Output:
19.