PMC:7029452 / 646-730 JSONTXT

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    LitCovid-sentences

    {"project":"LitCovid-sentences","denotations":[{"id":"T6","span":{"begin":0,"end":84},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Three categories of risk exposure and follow-up procedure were defined for contacts."}