| http://www.w3.org/ns/prov#value | - A A An advocate for immigrant and civil rights has started using text messages to warn residents about crime sweeps by a high-profile Arizona sheriff.Lydia Guzman, director of the nonprofit immigrant advocacy group Respect/Respeto, is the trunk of a sophisticated texting tree designed to alert thousands of people within minutes to the details of the sweeps, which critics contend are an excuse to r
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