PMC:7340597 / 156-171
Annnotations
LitCovid-sentences
{"project":"LitCovid-sentences","denotations":[{"id":"T4","span":{"begin":7,"end":14},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"stract\nPurpose\n"}