Complex sentence: HeHalutz or Hechalutz ("lit." The Pioneer) was an association of Jewish youth whose aim was to train its members to settle in the Land of Israel; it became an umbrella organization of the pioneering Zionist youth movements.
Split into simpler sentences: HeHalutz or Hechalutz ("lit." The Pioneer) was a Jewish youth movement that train young people for settling in the Land of Israel. It became an umbrella organization of the pioneering Zionist youth movements.