PMC:7143846 / 7709-7778
Annnotations
LitCovid-sentences
{"project":"LitCovid-sentences","denotations":[{"id":"T56","span":{"begin":0,"end":69},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"These lexical features were data sources for word frequency analysis."}