PMC:7224658 / 3985-4221 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T35","span":{"begin":0,"end":236},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"On March 2, the South Korean government initially postponed the commencement of elementary, middle, and high schools for 4 weeks until April 6, and of university classes until March 16, before switching to online classes until April 16."}