
Are the following mentions coreferent?:
<m> confirmed </m> in T-Mobile USA has just confirmed the numerous rumors that it will introduce the latest model in the BlackBerry Curve series next month. T-Mobile USA has just confirmed the numerous rumors that it will introduce the latest model in the BlackBerry Curve series next month. 
</s>
<m> announced </m> in T - Mobile has announced that it will carry the BlackBerry Q10, and business registration will begin at T - Mobile. com on April 29. 