PubMed:32238504 / 135-146 JSONTXT

Annnotations TAB JSON ListView MergeView

    LitCovid-TimeML

    {"project":"LitCovid-TimeML","denotations":[{"id":"tok25","span":{"begin":0,"end":11},"obj":"VBG"},{"id":"event10","span":{"begin":0,"end":11},"obj":"OCCURRENCE"}],"text":"challenging"}