Complex sentence: On 26 November 2014, Vergne announced he would be leaving Toro Rosso, and two days later, Toro Rosso confirmed that Sainz would partner Verstappen for the 2015 season.
Split into simpler sentences: On 26 November 2014, Vergne announced he would be leaving Toro Rosso. Two days later, Toro Rosso confirmed that Sainz would partner Verstappen for the 2015 season.