Sentence:  The findings emerged from questionnaires filled in by 2,211 staff in 145 wards of 55 hospitals in England and Wales and 105 observations of care of dementia patients. Two-thirds of staff said they had not had enough training to provide proper care, 50% said they had not been trained how to communicate properly with such patients and 54% had not been told how to <WSD>handle</WSD> challenging or aggressive behaviour. 
Meaning of the word marked with <WSD> tags:  To manage, control, or direct.