Original sentence: Between 1998 and 2004 more than 70 Center City office and manufacturing buildings had been converted into rental and condominium apartments.The Murano was announced in 2005 when Philadelphia, Pennsylvania was experiencing a condominium boom that had begun in the late 1990s
Edited sentence: The Murano was announced in 2005 when Philadelphia, Pennsylvania was experiencing a condominium boom that had begun in the late 1990s; between 1998 and 2004 more than 70 Center City office and manufacturing buildings had been converted into rental and condominium apartments