Complex sentence: In 1970, she founded the production company Hypopotam, and signed with Sonopresse for the distribution of its works; its first album, "Soleil", was released the same year.
Split into simpler sentences: In 1970, she founded the production company Hypopotam, and signed with Sonopresse for the distribution of its works. The first album produced under Hypopotam, "Soleil", was released the same year.