Simplify the following text for a Grade 9 native English-speaking person.
Original: Gustav Mahler Jugendorchester ( Gustav Mahler Youth Orchestra ) is a youth orchestra based in Vienna , Austria , founded in 1986 by conductor Claudio Abbado .
Simplified: The Gustav Mahler Jugendorchester ( Gustav Mahler Youth Orchestra ) is a youth orchestra based in Vienna , Austria . It was started in 1986 by the conductor Claudio Abbado .