With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Small urban centers are in the Northeast megalopolis.
text_B: The Northeast megalopolis -LRB- also Boston -- Washington Corridor or Bos-Wash Corridor -RRB- is the most heavily urbanized region of the United States , running primarily northeast to southwest from the northern suburbs of Boston , Massachusetts , to the southern suburbs of Washington , D.C. , in Northern Virginia .. Boston. Boston. urbanized region. Urban area. United States. United States. suburbs. suburbs. Massachusetts. Massachusetts. Northern Virginia. Northern Virginia. megalopolis. Megalopolis ( city type ). It includes the major cities of Boston , Providence , Hartford , New York City , Philadelphia , Baltimore , and Washington , D.C. , along with their metropolitan areas and suburbs as well as many smaller urban centers .. Boston. Boston. New York. New York City. Philadelphia. Philadelphia. Baltimore. Baltimore. suburbs. suburbs. Providence. Providence, Rhode Island. Hartford. Hartford, Connecticut. New York City. New York City. On a map , the Northeast megalopolis appears almost as a straight line .. megalopolis. Megalopolis ( city type ). As of the year 2000 , the region contained 49.6 million people , about 17 % of the U.S. population on less than 2 % of the nation 's land area , with a population density of 931.3 people per square mile -LRB- 359.6 people / km2 -RRB- , compared to the U.S. average of 80.5 per square mile 2 -LRB- 31 people / km2 -RRB- .. population. population. America 2050 projections expect the area to grow to 58.1 million people by 2025 .. America 2050. America 2050. French geographer Jean Gottmann popularized the term in his landmark 1961 study of the region , Megalopolis  : The Urbanized Northeastern Seaboard of the United States .. United States. United States. geographer. geography. Jean Gottmann. Jean Gottmann. Gottmann concluded that the region 's cities , while discrete and independent , are uniquely tied to each other through the intermeshing of their suburban zones , taking on some characteristics of a single , massive city  : a megalopolis .. megalopolis. Megalopolis ( city type )
related.