Complex sentence: The weekend marked the first time that soft tyres had a white stripe painted on them to distinguish them from the harder tyre compounds, which is of interest to spectators as all drivers must use both compounds during the race.
Split into simpler sentences: The weekend marked the first time that soft tyres had a white stripe painted on them. This stripe distinguishes between the softer and the harder tyre compounds, which is of interest to spectators as all drivers must use both compounds during the race.