Complex sentence: Indian People's Theatre Association (IPTA) was an association of leftist theatre-artists and others mostly based in Kolkata, West Bengal, Mumbai and Assam, India the goal of which was to bring cultural awakening among the people of India.
Split into simpler sentences: Indian People's Theatre Association (IPTA) was an association of leftist theatre-artists and others mostly based in Kolkata, West Bengal, Mumbai and Assam, India. Its goal was to bring cultural awakening among the people of India.