
Are the following mentions coreferent?:
<m> updates </m> in , global marketing VP Phil Schiller announced updates to the MacBook line. 
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<m> update </m> in Apple has chosen WWDC week to announce an update to its MacBook Air line. 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. An upgrade from Sandy Bridge to the faster Ivy Bridge processor, which brings with it a switch up from Intel HD Graphics 3000 to Intel HD Graphics 4000. 