Complex sentence: The Masada school was a Vocational School affiliated with the Betar movement, a right-leaning, Revisionist Zionist youth movement which was founded in 1923 with the aim to establish a Jewish state on both sides of the Jordan.
Split into simpler sentences: The Masada school was a Vocational School affiliated with the Betar movement. The Betar movement was a right-leaning, Revisionist Zionist youth movement which was founded in 1923 with the aim to establish a Jewish state on both sides of the Jordan.