Complex sentence: Pingle returned to India in 1914 as part of the Ghadar Conspiracy tasked to establish contact with the Indian revolutionary movement and, along with Rash Behari Bose, Sachin Sanyal and Kartar Singh, became one of the main coordinators of the attempted mutiny in February 1915.
Split into simpler sentences: Pingle returned to India in 1914 as part of the Ghadar Conspiracy tasked to establish contact with the Indian revolutionary movement. Along with Rash Behari Bose, Sachin Sanyal and Kartar Singh, he became one of the main coordinators of the attempted mutiny in February 1915.