
Are the following mentions coreferent?:
<m> according to </m> in According to sources, Hewlett - Packard makes another acquisition, chases IBM. 
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<m> announced </m> in The all-cash deal, announced Tuesday, represents HP's biggest gamble under the leadership of Mark Hurd, who was hired as chief executive in March 2005 to turn around the maker of personal computers and printers. 