Complex sentence: Still standing, the five-storey Elora grist mill from the 1830s was a sawmill, a distillery, a flour mill over the years; it became a luxury hotel, the Elora Mill Inn, in the 1970s but closed down in 2010.
Split into simpler sentences: Still standing, the five-storey Elora grist mill from the 1830s was a sawmill, a distillery, a flour mill over the years over subsequent years. In the 1970s, it became a luxury hotel, the Elora Mill Inn, but closed down in 2010.