
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> replace </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. 