Complex sentence: On the 31st January 2014, Zouma joined Chelsea for a fee believed to be around £12 million (€14.6 million), he will remain at Saint Étienne on loan for the remainder of the 2013-14 season.
Split into simpler sentences: On the 31st January 2014, Zouma joined Chelsea for a fee believed to be around £12 million (€14.6 million). He will remain at Saint Étienne on loan for the remainder of the 2013--14 season.