
Are the following mentions coreferent?:
<m> polygamy </m> in Two top leaders of the controversial polygamous sect in Bountiful, B.C., have been arrested and charged with practising polygamy. Oppal said in 2005, when he was appointed attorney general, that he was concerned about the polygamy issue in Bountiful because of the exploitation of women and children. 
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<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. 