Complex sentence: HSA currently occupies the top three floors and basement of Burke-McCoy Hall, 17 Holyoke Street, and the Harvard Shops at 52 JFK Street, 65 Mt.
Split into simpler sentences: HSA currently occupies the top three floors and basement of Burke-McCoy Hall. HSA also has other locations in Cambridge MA at 17 Holyoke Street, and the Harvard Shops at 52 JFK Street, 65 Mt.