
Are the following mentions coreferent?:
<m> second-degree murder </m> in The jury convicted the 32-year-old Peterson on Nov. 12 of first-degree murder for killing his wife and second-degree murder for the death of his unborn son. 
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<m> murder </m> in Upon learning of his death sentence, Scott Peterson sat defiantly still and tight-jawed, the same vacant expression he wore throughout a murder trial in which he never spoke.