Task: Text Categorization
Input (English): Question: What is the main cause of functional urinary incontinence in the elderly? 
 Options:  <0> Detrusor instability. <1> Obstruction due to fecalomas. <2> Laxity of the muscles of the pelvic floor. <3> Environmental barriers. <4> Urinary retention induced by medication.
Output (English): nursery