Complex sentence: In 1910, Bacha Khan opened a mosque school at his hometown Utmanzai, and in 1911 joined the freedom movement of Haji Sahib of Turangzai, however in 1915, the British authorities banned his mosque school.
Split into simpler sentences: In 1910, Bacha Khan opened a mosque school at his hometown Utmanzai, and in 1911 joined the freedom movement of Haji Sahib of Turangzai. However in 1915, the British authorities banned his mosque school.