Complex sentence: The first protocol was introduced in May 14,1954, and came into force August 7,1956, while the second protocol was introduced March 26,1999, and came in force March 9,2004.
Split into simpler sentences: The First Protocol was introduced in May 14 1954, and came into force August 7,1956. The Second Protocol was introduced March 26 1999, and came in force March 9,2004.