Complex sentence: The Public Health Act 1875 was an Act of the Parliament of Britain to combat filthy urban living conditions, which caused various public health threats, including the spread of many diseases such as cholera and typhus.
Split into simpler sentences: The Public Health Act 1875 is an Act of the Parliament of the United Kingdom. Its purpose is to combat filthy urban living conditions, which caused various public health threats, including the spread of many diseases such as cholera and typhus.