
Are the following mentions coreferent?:
<m> unveils </m> in Apple unveils cheaper Ivy Bridge - powered MacBook Air June 12, 2012 Apple has chosen WWDC week to announce an update to its MacBook Air line. It may lack the Retina display of its newly upgraded, headline - grabbing cousin, the MacBook Pro, but the 2012 Air sees significant advances too. An upgrade from Sandy Bridge to Ivy Bridge processors with improved integrated graphics is chief among the upgrades, and onboard memory has also received a boost. 
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<m> unveiled </m> in Apple CEO Steve Jobs unveiled the company's new high-end notebook line during the special event being held at Apple's headquarters in Cupertino, Calif. The new MacBook Pro will feature two graphic chipsets, the Nvidia GeForce 9400M embedded on the motherboard and the Nvidia GeForce 9600M as a discrete part. Jobs said that using the 9400M you get five hours of battery life and four hours with the 9600M. 