Complex sentence: In 2003, high-speed service was inaugurated on a new line from Madrid to Lleida and extended to Barcelona in 2008, the same year the lines from Madrid to Valladolid and from Córdoba to Málaga were inaugurated.
Split into simpler sentences: In 2003, high-speed service was inaugurated on a new line from Madrid to Lleida and extended to Barcelona in 2008. The same year, the lines from Madrid to Valladolid and from Córdoba to Málaga were inaugurated.