Complex sentence: In 1936,13-year-old Rodríguez joined the group of Ladislao (El Maestro Ladí) Martínez, "Conjunto de Industrias Nativas", as a singer and when he was 16 years old he participated in a recording with the renowned Cuarteto Mayarí.
Split into simpler sentences: In 1936,13-year-old Rodríguez joined the group of Ladislao (El Maestro Ladí) Martínez, "Conjunto de Industrias Nativas", as a singer. When he was 16 years, old he participated in a recording with the renowned Cuarteto Mayarí.