
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 Two leaders of polygamous groups with ties to Utah have been arrested in Canada, charged with practicing polygamy. The prosecutor recommended polygamy and sexual exploitation charges but British Columbia attorney general Wally Oppal opted to only pursue polygamy charges. 