
Are the following mentions coreferent?:
<m> announce </m> in T-Mobile has officially announce that they will launch the new RIM BlackBery Curve 8900 sometime in mid-February. Previously, the date of February 11 was leaked. 
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<m> announced </m> in T - Mobile has announced that it will be carrying the keyboard touting Q10, with pre - registration starting on April 29th. T - Mobile today announced that the BlackBerry Q10 will be added to its growing 4G LTE smartphone portfolio. T - Mobile today announced that the BlackBerry Q10 will be added to its growing 4G LTE smartphone portfolio. 