
Are the following mentions coreferent?:
<m> announcements </m> in While Apple's final keynote address at the annual MacWorld convention in San Francisco didn't contain the iPhone-related announcements many had hoped for, we were given all of the details on Apple's latest revamp to their largest and most powerful MacBook Pro. 
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<m> announcement </m> in Today may be Apple's last Macworld Expo appearance but Apple came bearing gifts. Apple's first hardware announcement at Macworld today introduced the 17 '' MacBook Pro. Built on the precision unibody enclosure, the Pro was launched as the world's thinnest 17 '' notebook, at only 0.98 inches thick, and also the world's lightest, weighing in at 6.6 pounds. 