
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 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. 