Question: Which French driver, formerly from Team Mugen, replaced Daniil Kvyat as a driver of the Toro Rosso STR12?
Sentence (from "Toro Rosso STR12"): The STR12 is powered by engines supplied by Renault after the team used 2015-specification Ferrari power units throughout the season; however, the engines were rebadged and the engine and chassis package run under the name 'Toro Rosso'.
Relevant evidence: No