PMC:7029452 / 24027-24124 JSONTXT

{"project":"LitCovid-PD-CLO","denotations":[{"id":"T136","span":{"begin":37,"end":46},"obj":"http://www.ebi.ac.uk/efo/EFO_0000876"}],"text":"However, this surveillance system is extremely time-consuming and requires considerable manpower."}

{"project":"LitCovid-sentences","denotations":[{"id":"T156","span":{"begin":0,"end":97},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"However, this surveillance system is extremely time-consuming and requires considerable manpower."}