Complex sentence: Haji Mastan became a Muslim leader in 1984 and formed Dalit Muslim Surakhsha Maha Sangh in 1985, which had Doulatram Kawle as a co-operator.
Split into simpler sentences: Haji Mastan became a Muslim leader in 1984. He formed Dalit Muslim Surakhsha Maha Sangh in 1985, which had Doulatram Kawle as a co-operator.