Complex sentence: The Progressive Writers'Association was set up in Kolkata in July 1936 and the All India Writers' Association was set up in Lucknow on 10 April 1936 under the leadership of Syed Sajjad Zahir.
Split into simpler sentences: The Progressive Writers'Association was set up in Kolkata in July 1936. The All India Writers' Association was set up in Lucknow on 10 April 1936 under the leadership of Syed Sajjad Zahir.