Complex sentence: The Young Republican Left of Catalonia (in Catalan: "Joventuts d'Esquerra Republicana de Catalunya", JERC) is the youth wing of the political party Republican Left of Catalonia (in Catalan: "Esquerra Republicana de Catalunya", ERC).
Split into simpler sentences: The Young Republican Left of Catalonia (in Catalan: "Joventuts d'Esquerra Republicana de Catalunya", JERC) is a Catalan youth political organization. It is the youth wing of the Republican Left of Catalonia (in Catalan: "Esquerra Republicana de Catalunya", ERC).