Complex sentence: He joined Rashtriya Swayamsevak Sangh (RSS) and subsequently joined Jan Sangh in 1971 has been associated with Bharatiya Janta Party since its establishment.
Split into simpler sentences: He joined Rashtriya Swayamsevak Sangh (RSS) and subsequently joined Jan Sangh in 1971. He has been associated with Bharatiya Janta Party since its establishment.