Complex sentence: Finishing last in 1993--94, the side spent six years in the second level; in 2005 it reached the Copa del Rey final for the first time ever, losing after extra time to Real Betis.
Split into simpler sentences: Finishing last in 1993--94, the side spent six years in the second level. In 2005, it reached the Copa del Rey final for the first time, losing after extra time to Real Betis.