PMC:7795804 / 5511-5681 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T34","span":{"begin":0,"end":70},"obj":"Sentence"},{"id":"T35","span":{"begin":71,"end":120},"obj":"Sentence"},{"id":"T36","span":{"begin":121,"end":170},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Apart from two open-ended questions, the answers were multiple-choice. In some cases, more than one choice was possible. The survey took an average of 15 min to complete."}