Complex sentence: The world record for conventional wheeled trains is held by a specially tuned TGV ("Train à Grande Vitesse"), reduced to three cars with higher voltage and larger wheels, broke the world record in April 2007, reaching.
Split into simpler sentences: The world record for conventional wheeled trains is held by a specially tuned TGV ("Train à Grande Vitesse"). Reduced to three cars with higher voltage and larger wheels, it broke the world record in April 2007, reaching.