Complex sentence: A week before his death he had given a sermon and performed a wedding and baptism and entertained dinner guests, when a stomachache afflicted him for the next 5 days culminating in his death during the night of Friday February 17th.
Split into simpler sentences: A week before his death he gave a sermon, performed a wedding and a baptism, and entertained dinner guests. A stomachache afflicted him for the next five days culminating in his death on the night of Friday February 17th.