PMC:7600245 / 19869-19910 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T147","span":{"begin":0,"end":41},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"It was first approved in 2001 by the U.S."}