PMC:7078825 / 13969-14258 JSONTXT

{"project":"LitCovid-PD-CLO","denotations":[{"id":"T47","span":{"begin":0,"end":1},"obj":"http://purl.obolibrary.org/obo/CLO_0001020"},{"id":"T48","span":{"begin":121,"end":122},"obj":"http://purl.obolibrary.org/obo/CLO_0001020"},{"id":"T49","span":{"begin":171,"end":174},"obj":"http://purl.obolibrary.org/obo/CLO_0050236"},{"id":"T50","span":{"begin":189,"end":190},"obj":"http://purl.obolibrary.org/obo/CLO_0001020"},{"id":"T51","span":{"begin":275,"end":276},"obj":"http://purl.obolibrary.org/obo/CLO_0001020"}],"text":"A limitation of our study is its retrospective nature. If the Internet search engines and social media data were used in a real-time surveillance system, finding the best lag time would be a challenge because we would not have any training data to calibrate the analysis for a new disease."}

{"project":"LitCovid-sentences","denotations":[{"id":"T104","span":{"begin":0,"end":54},"obj":"Sentence"},{"id":"T105","span":{"begin":55,"end":289},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"A limitation of our study is its retrospective nature. If the Internet search engines and social media data were used in a real-time surveillance system, finding the best lag time would be a challenge because we would not have any training data to calibrate the analysis for a new disease."}