Complex sentence: In 2014, ICAC while investigating alleged corrupt activities relating to a water infrastructure company called the then Premier O'Farrell as a witness and asked if recalled being sent a gift of $2978 wine by the CEO of the company.
Split into simpler sentences: In 2014, the ICAC investigated alleged corrupt activities relating to a water infrastructure company. It called Premier O'Farrell as a witness and asked if he recalled being sent a gift of a $2978 bottle of wine by the CEO of the company.