Complex sentence: The municipality was upgraded to a corporation in 1981 with the merger of Gunadala, Patamata and Bhavanipuram village panchayats and two villages Payakapuram and Kundavari kandrika in the corporation in 1985.
Split into simpler sentences: The municipality was upgraded to a corporation in 1981. With the merger of Gunadala, Patamata and Bhavanipuram village panchayats and two villages payakapuram and Kundavari kandrika in the corporation in 1985.