Assertion: geyser's activity | /r/CapableOf | decline dormant
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text: Fountain Geyser, located next to Morning Geyser-the largest geyser in the group, usually has long periods of dormancy of one or more years, it was very active between 1870 and 1910 when a hotel was built nearby, but activity declined and in 1929 became dormant until after World War 11.