
Are the following mentions coreferent?:
<m> take up </m> in Matt, who has stage and TV credits, will take up the role in 2010. 
</s>
<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. 