PMC:340383 / 22229-22232 JSONTXT

{"project":"craft-sa-dev","denotations":[{"id":"T5468","span":{"begin":0,"end":3},"obj":"NN"}],"text":"PFA"}

{"project":"craft-ca-core-ex-dev","denotations":[{"id":"T5238","span":{"begin":0,"end":3},"obj":"CHEBI_EXT:paraformaldehye"}],"text":"PFA"}