
Are the following mentions coreferent?:
<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. 
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<m> announced </m> in The new unibody MacBook Pro 17-inch ( PN MB604LL/A) is probably the most exciting thing announced here at Macworld Expo. 