Complex sentence: At age 19 she met with Chacho Gaytán at an airport, since then they've becom great friends, years later "Miguel Blasco" proposed that they should form a trio of which would be formed by Chacho, Alessandra and another member.
Split into simpler sentences: At age 19 she met with Chacho Gaytán at an airport, since then they've become great friends. Years later "Miguel Blasco" proposed that they should form a trio of which would be formed by Chacho, Alessandra and another member.