<s>[INST] Given an abstract text, please determine whether it contains any drug mentions. Provide a 'Yes' or 'No' answer based on the presence or absence of drugs. Abstract Text: Efficacy And Safety Of Tofacitinib After Failure Of Anti-Tnf Agent In Patients With Ulcerative Colitis:A Us-Based Propensity Matched Cohort Study[/INST] Yes</s>