Complex sentence: In 1980, a silver medal is won on the world championships and in 1981, the national Dutch equipe consist of 16 rowers, ten of which are ORCA-rowers (!), which resulted in another silver medal.
Split into simpler sentences: In 1980, a silver medal is won on the world championships. In 1981, the Dutch equipe consist of 16 rowers, ten of which are ORCA-rowers (!), which resulted in another silver medal.