CORD-19:29b6131c0d572d383cbc6774b12e4471aa612b07 / 60924-61027 JSONTXT

{"project":"CORD-19-Sentences","denotations":[{"id":"TextSentencer_T327","span":{"begin":0,"end":103},"obj":"Sentence"},{"id":"T40655","span":{"begin":0,"end":103},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"This test virus was used to ''challenge'' mice that had been immunized with the two different vaccines."}