Complex sentence: Historically, during the demolition of the disputed Mosque of Babur in Ayodhya, Mathania village had sacrificed shree Setharam parihar, and every year a Pooja and a religious fair were organised on kartik purnima in his memory.
Split into simpler sentences: Historically, during the demolition of the disputed Mosque of Babur in Ayodhya, Mathania, shree Setharam parihar was sacrificed. Every year a Pooja and religious fair are organized on kartik purnima in his memory.