Question: In what province is the train Richard Fontaine Maury is best known for?
Sentence (from "Tren a las Nubes"): The service runs along the eastern part of the Salta–Antofagasta railway line of the Belgrano Railway (also known as the "C-14" line) that connects the Argentine Northwest with the Chilean border in the Andes mountain range, over 4220 m above mean sea level, the fifth highest railway in the world.
Relevant evidence: No