
Are the following mentions coreferent?:
<m> Begins </m> in T - Mobile BlackBerry Q10 Pre - Order Begins April 29th for Business Customers on April 24, 2013 T - Mobile today announced that the BlackBerry Q10 will be added to its growing 4G LTE smartphone portfolio.
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<m> start </m> in Research in Motion today announced that T-Mobile USA will start selling the new BlackBerry Curve 8900 smartphone to its customers. T-Mobile is expected to launch the BlackBerry Curve 8900 smartphone in mid-February. 