Complex sentence: The same year, Majumdar and Sanyal broke away and formed the All India Coordination Committee of Communist Revolutionaries which in 1969 founded the Communist Party of India (Marxist-Leninist)--with Majumdar as its General Secretary.
Split into simpler sentences: The same year, Majumdar and Sanyal broke away and formed the All India Coordination Committee of Communist Revolutionaries. AICCCR founded the Communist Party of India (Marxist-Leninist) in 1969, with Majumdar as its General Secretary.