
Are the following mentions coreferent?:
<m> undisclosed </m> in Hewlett - Packard to buy consulting firm EYP Mission Critical Facilities for an undisclosed sum. 
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<m> said </m> in An EDS spokesman said that it is too early to tell what impact Hewlett-Packard Co.'s decision to acquire Electronic Data Systems Corp. will have on EDS'operations in South Charleston. Bill Ritz, EDS spokesman, pointed out that Hewlett-Packard's acquisition of EDS still needs the approval of regulators and EDS'stockholders. 