PMC:7143846 / 7688-7818 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T56","span":{"begin":21,"end":90},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"nt) dictionary [23]. These lexical features were data sources for word frequency analysis.\nAfter feature extraction, we used the p"}

{"project":"2_test","denotations":[{"id":"32204411-27322382-49451144","span":{"begin":16,"end":18},"obj":"27322382"},{"id":"T61461","span":{"begin":16,"end":18},"obj":"27322382"}],"text":"nt) dictionary [23]. These lexical features were data sources for word frequency analysis.\nAfter feature extraction, we used the p"}