
Are the following mentions coreferent?:
<m> saying </m> in Advanced Micro Devices ( AMD ) Chief Executive Hector Ruiz waxed metaphorical as he described his company's acquisition of ATI Technologies. 
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<m> announced </m> in RBC Capital Markets downgraded ATI Technologies to sector perform from outperform after Advanced Micro Devices announced its intention to buy the Canadian graphics chip-maker for $ 5.4 billion on Monday. 