PMC:7210464 / 60179-60405 JSONTXT

{"project":"LitCovid-PD-CLO","denotations":[{"id":"T242","span":{"begin":11,"end":13},"obj":"http://purl.obolibrary.org/obo/CLO_0050509"}],"text":"On January 27, the Ministry of Education of China postponed start of the spring semester in 2020, and on February 7, it further announced that students were not allowed to return to school campus without approvals from school."}

{"project":"LitCovid-sentences","denotations":[{"id":"T533","span":{"begin":0,"end":226},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"On January 27, the Ministry of Education of China postponed start of the spring semester in 2020, and on February 7, it further announced that students were not allowed to return to school campus without approvals from school."}