Question: What is the nationality of the racing team that developed the Toro Rosso STR6 ?
Sentence (from "Toro Rosso STR6"): It is the second car that the team has built entirely on their own following the introduction of regulations that banned the use of "customer chassis", a chassis developed by one team and purchased by another (prior to 2010 Toro Rosso used a customer chassis from its "big brother" Red Bull Racing).
Relevant evidence: No