@prefix pr: <http://www.wikidata.org/prop/reference/> .
@prefix wdref: <http://www.wikidata.org/reference/> .

wdref:1531c73758ddafff7c5e550ec0052c6d5aaf3bcb pr:P854 <http://www.cdc.gov/niosh/ershdb/emergencyresponsecard_29750021.html> .