Complex sentence: Muslims across Spain are lobbying the Roman Catholic church to allow them to pray in the complex, with the Islamic Council of Spain lodging a formal request with the Vatican, however, Spanish church authorities and the Vatican oppose this move.
Split into simpler sentences: Muslims across Spain are lobbying the Roman Catholic church to allow them to pray in the complex, with the Islamic Council of Spain lodging a formal request with the Vatican. However, Spanish church authorities and the Vatican oppose this move.