Question: Which country built the Ouvrage Pas du Roc?
Sentence (from "Ouvrage Pas du Roc"): The ouvrage consists of one entry blocks, one infantry block, two artillery blocks and one observation block 6 km south of Modane and 1.6 km east of Ouvrage Le Lavoir in the vicinity of the Col de Fréjus.
Relevant evidence: No