Complex sentence: Vettel joined the group by using alternative strategy--using supersoft tyres, he then made the pass on Vestappen thus Hamilton-Rosberg-Vettel-Vestappen, separated less than 3 seconds.
Split into simpler sentences: Vettel joined the group by using alternative strategy--using supersoft tyres. Vettel made the pass on Vestappen thus Hamilton-Rosberg-Vettel-Vestappen, separated less than 3 seconds.