PMC:7784787 / 8550-8673 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T73","span":{"begin":0,"end":123},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"The single layer mask in Figure 2C is of unknown 1.0-mm thick material, of a design which was cheaply and widely available."}