Complex sentence: Yehuda Avner (originally Haffner) was born in Manchester, England in 1928.He was active in the Religious-Zionist youth movement, Bnei Akiva, and was committed to helping build a Jewish State in Palestine.
Split into simpler sentences: Yehuda Avner (originally Haffner) was born in Manchester, England in 1928. His nephew mechel is a dentist He was active in the Religious-Zionist youth movement, Bnei Akiva, and was committed to helping build a Jewish State in Palestine.