PMC:7784787 / 7174-7274 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T58","span":{"begin":0,"end":100},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"A beam block was used at the axicon’s aperture to prevent direct illumination of parts of the dummy."}