Complex sentence: Completed in 1985, known as the Westin Stamford and was the tallest hotel in the world during that time, it was refurbished in 2001 together with Raffles The Plaza.
Split into simpler sentences: Completed in 1985, it was then the tallest hotel in the world and known as the Westin Stamford. It was refurbished in 2001 together with Raffles The Plaza.