Sentence:  The use of algorithms in policing is one example of their increasing influence on our lives....who, if anyone, is policing their use[?] Such concerns were sharpened further by the continuing revelations about how the US National Security Agency (NSA) has been using algorithms to help it interpret the colossal <WSD>amounts</WSD> of data it has collected from its covert dragnet of international telecommunications. 
Meaning of the word marked with <WSD> tags:  A quantity or volume.