| http://www.w3.org/ns/prov#value | - Yes, illegal immigration is a serious problem for the United States: Who left the door open? / Donald L. Barlett and James B. Steele -- Millions of Visa overstayers are part of the illegal immigration problem / Associated Press -- Most Americans believe illegal immigration is a problem / Federation for American Immigration Reform -- Mexican radicals want to retake the American Southwest / Art Moor
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