sentence55
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http://data.gesis.org/somesci/PMC6147404/sentence55
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106
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In winter, PM2.5 concentration is usually high because coal is used as the main energy for winter heating.
rdf:
type
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Context
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Sentence
![[This page as RDF]](http://data.gesis.org/somesci/static/rdf-icon.gif){kind=icon}