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    LitCovid-sentences

    {"project":"LitCovid-sentences","denotations":[{"id":"T13","span":{"begin":57,"end":75},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":" in both material penetration and leakage was observed.\n\nGraphical abstract\n\nTw"}