
Are the following mentions coreferent?:
<m> make </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. 
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<m> set </m> in Peter Capaldi is officially set to replace exiting star Matt Smith as the TARDIS leader, producer Steven Moffat announced on the live BBC special Doctor Who Live : The Next Doctor Sunday. He appeared opposite David Tennant in The Fires of Pompeii in 2008 as Caecilius and had a major role on Torchwood : Children of Earth, the Doctor Who spinoff series. He also appeared in Brad Pitt's World War Z as a World Health Organization doctor, or W. H. O. doctor for short. 