View Historical Volcanic Activity in a Region

Using "Volcano" entities, it is possible to explore data about eruptions of a particular volcano.

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Using FilteredEntityClass, you can find all known volcanoes with eruptions in the last five years.

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Find the countries each volcano is in.

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Using that data, you can find all the volcanoes in a particular country or countries.

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Then you can compute the number of volcanoes in each country.

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Repeat those same steps to show volcanoes from a list of countries that have erupted within a recent period of time.

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Show volcanoes in the "Ring of Fire" that have erupted in the last 25 years.

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