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A.....Which doesn't work very well
B. The new DVD player we've brought....
A. ...Which is sung by Robbie Williams
B. The new song I'm listening to is sung by Robbie Williams
A. ... Who said that I should go on diet
B. The doctor I've seen told me that I should go on diet.
Voilà, j'espère ne pas avoir fait de fautes :)

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