Complex sentence: He had taken on Asaram Bapu in March 2013 over an incident during Holi in Nagpur, when Bapu and his followers used drinking water from tankers brought from the Nagpur Municipal Corporation for celebrating the festival and were accused of wasting it while rest of Maharashtra faced drought.
Split into simpler sentences: He had taken on Asaram Bapu in March 2013 over an incident during Holi in Nagpur, when Bapu and his followers used drinking water from tankers brought from the Nagpur Municipal Corporation to celebrate the festival. They were accused of wasting it while rest of Maharashtra faced drought.