Task: Question Generation
Input (English): Yale and New Haven are working to build a medical and biotechnology research hub in the city and Greater New Haven region, and are succeeding to some extent.[citation needed] The city, state and Yale together run Science Park, a large site three blocks northwest of Yale's Science Hill campus. This multi-block site, approximately bordered by Mansfield Street, Division Street, and Shelton Avenue, is the former home of Winchester's and Olin Corporation's 45 large-scale factory buildings. Currently, sections of the site are large-scale parking lots or abandoned structures, but there is also a large remodeled and functioning area of buildings (leased primarily by a private developer) with numerous Yale employees, financial service and biotech companies.
Output (English): The area of Science Park was originally filled with what?