{ "items" : [
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        "http://www.w3.org/ns/prov#value" : [ "Cages, platforms, or other devices which are used to transport persons in shafts and slopes shall be equipped with safety catches or other no less effective devices approved by the Secretary that act quickly and effectively in an emergency, and such catches shall be tested at least once every two months." ] ,
        "http://www.w3.org/ns/prov#wasQuotedFrom" : [ "msha.gov" ] } },

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