Complex sentence: After impressing in in the 2006 FIA (European Touring Car Cup) O'Brien was signed to compete in the 2007 he drove for GR Asia in the WTCC in a SEAT Leon.
Split into simpler sentences: After impressing in in the 2006 FIA (European Touring Car Cup), O'Brien was signed to compete in the 2007. O'Brien drove for GR Asia in the WTCC in a SEAT Leon.