Complex sentence: The West Virginia Building is a deep-red brick structure that looms over 4th Avenue and at the time of its completion, was the tallest tower in the state but has since fallen to 18th, behind the office towers of Charleston.
Split into simpler sentences: The West Virginia Building is a deep-red brick structure that looms over 4th Avenue. At the time of its completion, it was the tallest tower in the state, but it has since fallen to 18th, behind the office towers of Charleston.