PMC:7376974 / 96687-96753 JSONTXT

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    LitCovid-sentences

    {"project":"LitCovid-sentences","denotations":[{"id":"T593","span":{"begin":0,"end":66},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Several challenges still need to be tackled before their safe use."}