Assertion: moderate drought | /r/CapableOf | occur for example
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text: For example, a D1, or Moderate Drought, is expected to occur approximately 2 or 3 times out of every 10 years, and a D4, or Exceptional Drought, is expected to occur 1 or 2 times out of every 100 years (think of the commonly referred to 1-in-100 year event).