
Are the following mentions coreferent?:
<m> MacWorld </m> in While Apple's final keynote address at the annual MacWorld convention in San Francisco did not 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. 
</s>
<m> Macworld Expo 2009 </m> in The only hardware release at Macworld Expo 2009 was a predictable unibody upgrade for the 17-inch MacBook Pro, which Apple reports will have an eight-hour battery life. 