Complex sentence: The Lebanese Scouting Federation, the national federation of 29 Scouting organizations of Lebanon, was founded in 1961, and became a member of the World Organization of the Scout Movement in 1947.
Split into simpler sentences: The Lebanese Scouting Federation, the national federation of 29 Scouting organizations of Lebanon, was founded in 1961. Lebanon became a member of the World Organization of the Scout Movement in 1947.