
Are the following mentions coreferent?:
<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. 
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<m> announcing </m> in In a news conference announcing the merger held in Taipei yesterday, Henri Richard, executive vice president of AMD urged investors not to worry as ATI's relations with TSMC and its rival United Microelectronics Corp. would not change. 