<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 Tolerability Of 1-L Polyethylene Glycol Plus Ascorbic Acid With Senna Versus 2-L Polyethylene Glycol Plus Ascorbic Acid For Colonoscopic Bowel Preparation:A Prospective, Randomized, Investigator-Blinded Trial[/INST] Yes</s>