Complex sentence: Honda F1 ran with an "Earth livery" on their RA107 car, the first time since 1968, the year in which sponsorship in the sport became widespread, that a team ran sponsor-free for an entire season.
Split into simpler sentences: Honda F1 ran with an "Earth livery" on their RA107 car. It was the first time since 1968, the year in which sponsorship in the sport became widespread, that a team ran sponsor-free for an entire season.