982
Though close to Reagan National Airport and dense with hotels , the area has long been seen as a gloomy 1960s era enclave of offices connected by underground passages .
 facility: Reagan National Airport; date: 1960s
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: date, organization, person, geographical social political, national religious political, facility, cardinal, location, work of art, law, event, product, ordinal, percent, time, quantity, money, language 
Text: {0} 
 Entities: Reagan National Airport, 1960s 
Answer:
 facility: Reagan National Airport; date: 1960s