With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The children of a spider are located in the cephalothorax.
text_B: The Residences at The Ritz-Carlton is a luxury residential skyscraper in Center City in Philadelphia , Pennsylvania .. Philadelphia. Philadelphia. Pennsylvania. Pennsylvania. skyscraper. skyscraper. Center City. Center City, Philadelphia. At 518 ft , the 48-story skyscraper is the twelfth-tallest building in Philadelphia , and the tallest residential tower in the city .. Philadelphia. Philadelphia. skyscraper. skyscraper. twelfth-tallest building in Philadelphia. List of tallest buildings in Philadelphia. residential tower. Waldorf Astoria Hotel & Residences Philadelphia. The building was erected on the former site of One Meridian Plaza which was seriously damaged by a deadly fire in 1991 .. One Meridian Plaza. One Meridian Plaza. One Meridian Plaza was demolished in 1999 and the property was sold by E / R Partners to the Arden Group the next year .. One Meridian Plaza. One Meridian Plaza. Development of the site by the Arden Group , which owns the adjacent Ritz-Carlton Philadelphia , was delayed for years as a result of a feud with rival developer Mariner Commercial Properties .. Philadelphia. Philadelphia. Ritz-Carlton Philadelphia. The Ritz-Carlton Philadelphia. Mariner owned the property 1441 Chestnut Street , which sits south of the Residences at The Ritz-Carlton site and intends to build its own residential tower .. residential tower. Waldorf Astoria Hotel & Residences Philadelphia. The feud began after Arden Group 's lead partner Craig Spencer blocked approval of 1441 Chestnut Street because he felt the tower 's design would be detrimental to the planned Residences at The Ritz-Carlton tower .. This led to several years of dispute between the developers trying to block construction of each other 's towers .. After several redesigns , the feud was declared over , and construction on the Residences at The Ritz-Carlton began on May 2 , 2006 .. The blue glass skyscraper opened to residents in January 2009 .. skyscraper. skyscraper. The Residences at The Ritz-Carlton features 270 condominiums and penthouses , which range in price from US$ 550,000 to US$ 12 million .. penthouses. Penthouse apartment. The high-rise also features an underground parking garage , a fitness center , a pool , and a private garden and public plaza called Girard Park .
not_related.