Complex sentence: Antras is lopcated some 25 kms south-east of Saint-Gaudens and 20 kms north-east of Bagneres-de-Luchon only 1 km from the Spanish border and a part of the former province of Couserans in the Biros Valley.
Split into simpler sentences: Antras is lopcated some 25 kms south-east of Saint-Gaudens, 20 kms north-east of Bagneres-de-Luchon, and only 1 km from the Spanish border. It was part of the former province of Couserans in the Biros Valley.