Complex sentence: The Great Smog of 1952 (London, England), is one of the most serious examples of such an inversion; it was blamed for an estimated 11,000 to 12,000 deaths.
Split into simpler sentences: The Great Smog of 1952 in London, England, is one of the most serious examples of such an inversion. It was blamed for an estimated 11,000 to 12,000 deaths.