
Are the following mentions coreferent?:
<m> take up </m> in Matt Smith will take up steering the TARDIS and saving the universe when the series returns for its fifth season. 
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<m> replacing </m> in Matt Smith, 26, will make his debut in 2010, replacing David Tennant, who leaves at the end of this year. He is the youngest actor to play the part. He has previously appeared on TV, in films and the theatre and is best known for appearing in the BBC's The Ruby in the Smoke. 