PMC:7210464 / 58371-58407
Annnotations
LitCovid-sentences
{"project":"LitCovid-sentences","denotations":[{"id":"T520","span":{"begin":0,"end":36},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Reducing inter-city population flows"}