
Are the following mentions coreferent?:
<m> polygamy </m> in Canadian authorities filed charges against the leader of a group that openly practices polygamy in British Columbia and has links to U.S. polygamist communities, local media reported. Winston Blackmore and another member of the Fundamentalist Church of Jesus Christ of Latter Day Saints ( FLDS) were arrested for violating a little-used law against polygamy, the Vancouver Sun reported on its website, citing court documents. The Vancouver Sun reported on its website that Winston Blackmore and another member of the FLDS had been arrested for violating a little-used law against polygamy. 
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<m> polygamy </m> in The arrests of Winston K. Blackmore, 52, and James Oler, 44, on charges of polygamy were the culmination of the most recent seven-month charge assessment review by special prosecutor Terrence Robertson. Last June, Oppal hired Robertson to investigate whether charges should be laid against the openly polygamist members of the Bountiful commune, where older men routinely are married, legally and common-law, to much younger women. 