Assertion: bleach's effect | /r/HasProperty | recognized in medical field
Facets:
value: for some time
type: TEMPORAL
Source sentences:
text: Although the tooth discoloring effects associated with tetracycline ingestion in children have been recognized in the medical field for some time, tooth staining associated with adult ingestion of tetracycline analogs (eg, minocycline for acne treatment) also has been reported.14