With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Houston is not a city.
text_B: Houston -LRB- -LSB- ˈhjuːstən -RSB- -RRB- is the most populous city in the state of Texas and the fourth-most populous city in the United States .. state. U.S. state. Texas. Texas. fourth-most populous city in the United States. list of United States cities by population. With a census-estimated 2014 population of 2.239 million within an area of 667 sqmi , it is also the largest city in the southern United States and the seat of Harris County .. Harris. Harris County, Texas. southern United States. southern United States. Located in Southeast Texas near the Gulf of Mexico , it is the principal city of the Greater Houston metro area , which is the fifth-most populated MSA in the United States .. Texas. Texas. Southeast Texas. Southeast Texas. Gulf of Mexico. Gulf of Mexico. Greater Houston. Greater Houston. MSA. Metropolitan Statistical Area. Houston was founded on August 28 , 1836 , near the banks of Buffalo Bayou -LRB- now known as Allen 's Landing -RRB- and incorporated as a city on June 5 , 1837 .. Buffalo Bayou. Buffalo Bayou. The city was named after former General Sam Houston , who was president of the Republic of Texas and had commanded and won at the Battle of San Jacinto 25 mi east of where the city was established .. Sam Houston. Sam Houston. Texas. Texas. Republic of Texas. Republic of Texas. Battle of San Jacinto. Battle of San Jacinto. The burgeoning port and railroad industry , combined with oil discovery in 1901 , has induced continual surges in the city 's population .. In the mid-20th century , Houston became the home of the Texas Medical Center -- the world 's largest concentration of healthcare and research institutions -- and NASA 's Johnson Space Center , where the Mission Control Center is located .. Texas. Texas. Texas Medical Center. Texas Medical Center. NASA. NASA. Johnson Space Center. Lyndon B. Johnson Space Center. Mission Control Center. Christopher C. Kraft Jr. Mission Control Center. Houston 's economy has a broad industrial base in energy , manufacturing , aeronautics , and transportation .. Leading in health care sectors and building oilfield equipment , outside of New York City , Houston has more Fortune 500 headquarters than any other U.S. municipality within its city limits .. City. City. New York City. New York City. Fortune 500. Fortune 500. The Port of Houston ranks first in the United States in international waterborne tonnage handled and second in total cargo tonnage handled .. Port of Houston. Port of Houston. Nicknamed the `` Space City '' , Houston is a global city , with strengths in business , international trade , entertainment , culture , media , fashion , science , sports , technology , education , medicine , and research .. City. City. global city. global city. The city has a population from various ethnic and religious backgrounds and a large and growing international community .. Houston is the most diverse city in Texas and has been described as the most racially and ethnically diverse major metropolis in the U.S. .. Texas. Texas. most diverse city. Demographics of Houston. It is home to many cultural institutions and exhibits , which attract more than 7 million visitors a year to the Museum District .. Museum District. Houston Museum District. Houston has an active visual and performing arts scene in the Theater District and offers year-round resident companies in all major performing arts .
related.