Question: What is the name of the controversial event, in which the Toyota TF105 participated, where only 6 of the 20 entrants finished the race?
Sentence (from "Toyota TF105"): The low-point was the withdrawal of the team from the 2005 United States Grand Prix, due to Michelin tyre safety concerns, as Ralf Schumacher's left front tyre deflated on Indianapolis's famous last corner in Friday practice and Schumacher crashed into the wall and had to be taken to hospital.
Relevant evidence: Yes