Individual #Mid-Atlantic_states  a region of the eastern United States comprising New York and New Jersey and Pennsylvania and Delaware and Maryland
  instance of:  #geographical_area
  part:  #Delaware  #Maryland  #New_Jersey  #New_York_State  #Pennsylvania
  part of:  #USA__United_States_of_America__United_States__America__US__U.S.__U.S.A.  North American republic containing 50 states - 48 conterminous states in North America plus Alaska in northwest North America and the Hawaiian Islands in the Pacific Ocean; achieved independence in 1776
     part of:  #North_America  a continent (the third largest) in the western hemisphere connected to South America by the Isthmus of Panama
        part of:  #northern_hemisphere  the hemisphere north of the equator
        part of:  #western_hemisphere__westernhemisphere__occident__New_World  the hemisphere that includes North and South America
        part of:  #the_Americas__America  North and South America

No statement uses or specializes #Mid-Atlantic_states; click here to add one.