Complex sentence: To promote the album, which sold more than one million copies, Arjona embarked on his "Galería Caribe Tour", which began in Mexico in 2000 and finished in 2001.
Split into simpler sentences: To promote the album, which sold more than one million copies, Arjona embarked on his "Galería Caribe Tour". The tour began in Mexico in 2000 and finished in 2001.