Complex sentence: Marcel Delaherche and Luc Melua were technical marshals; to-day, if the AMCF Club is always existing, "Larivière Editions" leads the manifestation.
Split into simpler sentences: Marcel Delaherche and Luc Melua were technical marshals. To-day, if the AMCF Club is always existing, "Larivière Editions" leads the manifestation.