PMC:7782580 / 770-859 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T7","span":{"begin":5,"end":89},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"0)). Heatmaps are used to visualize the salient features extracted by the neural network."}