Complex sentence: A report published in 1912 claimed that TB-related deaths in Ireland were fifty percent higher than in England or Scotland, and that the vast majority of TB-related deaths in Ireland occurred amongst the poorer classes.
Split into simpler sentences: A report published in 1912 found that TB-related deaths in Ireland were 50% higher than in England or Scotland. The vast majority of TB-related deaths in Ireland occurred among the poorer classes.