Complex sentence: They started working on the songs in the spring of 1985 in Le Rayol in South of France and around September, the band headed to Mountain Studios in Vancouver to work with producer Mike Stone.
Split into simpler sentences: They started working on the songs in the spring of 1985 in a place called Le Rayol in South of France. Around September of the same year, they headed to Mountain Studios in Vancouver to work with producer Mike Stone.