Complex sentence: Major renovations to the third floor of Annex Hall were constructed in 1989 at a cost of $1 million to add architectural studios and facilities, and Wentworth gained accreditation from the National Architectural Accrediting Board in 1991.
Split into simpler sentences: Major renovations to the third floor of Annex Hall were enacted in 1989 at a cost of $1 million to add architectural studios and facilities. After renovation, Wentworth gained accreditation from the National Architectural Accrediting Board in 1991.