With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Marie Curie did not begin her practical scientific training in Warsaw.
text_B: Gregg County is a county located in the eastern part of the U.S. state of Texas .. county. County ( US ). U.S. state. U.S. state. Texas. Texas. As of the 2010 census , its population was 121,730 .. 2010 census. 2010 United States Census. Its county seat is Longview .. county. County ( US ). county seat. county seat. Longview. Longview, Texas. The county is named after John Gregg , a Confederate general killed in action during the American Civil War .. John Gregg. John Gregg ( CSA ). county. County ( US ). Confederate. Confederate States of America. American Civil War. American Civil War. Gregg County is part of the Longview , TX Metropolitan Statistical Area as well as the Longview -- Marshall , TX Combined Statistical Area .. Longview. Longview, Texas. Metropolitan Statistical Area. Longview, Texas metropolitan area. Marshall. Marshall, Texas. Combined Statistical Area. Longview-Marshall combined statistical area. Discovery of oil near Kilgore , Texas in October 1920 was the beginning of an oil boom that attracted workers to the county and expanded the population by more than 500 % by 1940 , according to the census .. county. County ( US ). Texas. Texas. By that time , the economy had stabilized but the East Texas Oil Field , extending in five counties , has continued to be important to the county and region 's economy .. county. County ( US ). Texas. Texas. East Texas Oil Field. East Texas Oil Field
not_related.