Sentence:  The 70,000 number, though, was arrived at only after the refugees had been in place in refugee camps for seven to eight weeks, and was obtained by means of a large <WSD>wristbanding</WSD> exercise in which every single refugee had a non-removable wristband put on in one day. 
Meaning of the word marked with <WSD> tags:  The process of putting a wristband on a person.