PMC:7199903 / 709-739 JSONTXT

{"project":"LitCovid-PD-CHEBI","denotations":[{"id":"T4","span":{"begin":19,"end":26},"obj":"Chemical"}],"attributes":[{"id":"A4","pred":"chebi_id","subj":"T4","obj":"http://purl.obolibrary.org/obo/CHEBI_59132"}],"text":"be used to measure antigen qua"}

{"project":"LitCovid-sample-Enju","denotations":[{"id":"T104","span":{"begin":0,"end":2},"obj":"VB"},{"id":"T105","span":{"begin":3,"end":7},"obj":"VBN"},{"id":"T106","span":{"begin":8,"end":10},"obj":"TO"},{"id":"T107","span":{"begin":11,"end":18},"obj":"VB"},{"id":"T108","span":{"begin":19,"end":26},"obj":"NN"}],"relations":[{"id":"R108","pred":"arg2Of","subj":"T105","obj":"T104"},{"id":"R110","pred":"arg3Of","subj":"T107","obj":"T105"},{"id":"R111","pred":"arg1Of","subj":"T107","obj":"T106"}],"text":"be used to measure antigen qua"}