PubMed:32220650 / 1228-1232
Annnotations
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok265","span":{"begin":0,"end":4},"obj":"CD"},{"id":"lookup51","span":{"begin":0,"end":4},"obj":"time"},{"id":"lookup52","span":{"begin":0,"end":4},"obj":"number"}],"text":"four"}