Complex sentence: In 1901, Grant was sent to Japan to open the church's Japanese Mission and he served as its president until 1903 when he returned home but was almost immediately sent to preside over the British and European missions of the church.
Split into simpler sentences: In 1901, Grant was sent to Japan to open the church's Japanese Mission. He served as its president until 1903 when he returned home but was almost immediately sent to preside over the British and European missions of the church.