
Are the following mentions coreferent?:
<m> Polygamy </m> in Canadian authorities announced that two leaders of polygamous factions in Bountiful, British Columbia, have been arrested. Jim Oler, 44, and Winston Blackmore, 52, have been charged under the criminal code with practicing polygamy. Blackmore, alleged to have 19 wives, is charged with practicing polygamy between May 1, 2005, and Dec. 8, 2006. 
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<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. 