premise: The Beverly Center Business District encompasses much of the historic 19th century commercial heart of Beverly, Massachusetts. Centered on Cabot and Church Streets between Central Street and the Beverly Common, its architecture reflects the city's growth over 150 years. The district was added to the National Register of Historic Places in 1984.
hypothesis: The National Register of Historic Places was established in 1984
reason: We do not know when the The National Register of Historic Places was established.  It may have been prior to 1984