
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> announced </m> in AMD ( NYSE : AMD ) today announced it has signed a definitive agreement to acquire SeaMicro, a pioneer in energy - efficient, high - bandwidth microservers, for approximately $334 million, of which approximately $281 million will be paid in cash. 