<http://dbpedia.org/resource/Pyroclastic_flow>	<http://www.w3.org/2000/01/rdf-schema#comment>	"A pyroclastic flow (also known scientifically as a pyroclastic density current) is a fast-moving current of hot gas and rock (collectively known as tephra), which reaches speeds moving away from a volcano of up to 700 km/h (450 mph). The gas can reach temperatures of about 1,000 \u00B0C (1,830 \u00B0F). Pyroclastic flows normally hug the ground and travel downhill, or spread laterally under gravity."@en .
<http://dbpedia.org/resource/Pyroclastic_flow>	<http://dbpedia.org/ontology/thumbnail>	<http://commons.wikimedia.org/wiki/Special:FilePath/Pyroclastic_flows_at_Mayon_Volcano.jpg?width=300> .
<http://dbpedia.org/resource/Pyroclastic_flow>	<http://xmlns.com/foaf/0.1/depiction>	<http://commons.wikimedia.org/wiki/Special:FilePath/Pyroclastic_flows_at_Mayon_Volcano.jpg> .