PMC:7796344 / 90-217 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T2","span":{"begin":5,"end":13},"obj":"Sentence"},{"id":"T3","span":{"begin":14,"end":25},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"019\n\nAbstract\nBackground: Annually, approximately 10 million pilgrims travel to the Kingdom of Saudi Arabia (KSA) for Umrah fro"}