Question: MediaCorp Subaru Impreza WRX Challenge has been held since its inauguration at the open air space in front of a shopping and commercial centre that was offically opened in what year?
Sentence (from "2015 Rally America season"): The championship was won by the team of David Higgins and Craig Drew, representing Subaru Rally Team USA in their #75 2015 Subaru Impreza WRX STI.
Relevant evidence: No