Complex sentence: Ukraine national under-19 football team is the second junior national football team in the country and upon a successful performance at the European championship for the under-19 teams it qualifies for the Youth World Cup that is organized for teams of under-20.
Split into simpler sentences: Ukraine national under-19 football team is the second junior national football team in the country. Upon a successful performance at the European championship for the under-19 teams it qualifies for the Youth World Cup that is organized for teams of under-20.