PMC:7601109 / 18024-18146 JSONTXT

{"project":"LitCovid-PD-CLO","denotations":[{"id":"T8000","span":{"begin":68,"end":69},"obj":"http://purl.obolibrary.org/obo/CLO_0001020"}],"text":"The volatile fraction of propolis varies in each sample even within a single country due to plant source and climate [79]."}

{"project":"LitCovid-sentences","denotations":[{"id":"T113","span":{"begin":0,"end":122},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"The volatile fraction of propolis varies in each sample even within a single country due to plant source and climate [79]."}