With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: San Francisco's Chinatown is the oldest Chinatown in North America.
text_B: The Chinatown centered on Grant Avenue and Stockton Street in San Francisco , California , is the oldest Chinatown in North America and next to Manhattan 's Chinatown , the largest Chinese enclave outside Asia .. San Francisco. San Francisco. Grant Avenue. Grant Avenue. Stockton Street. Stockton Street ( San Francisco ). California. California. Chinatown. Chinatown. North America. North America. Chinese. Han Chinese. Asia. Asia. enclave. Ethnic enclave. It is the oldest of the four notable Chinatowns in the city .. four notable Chinatowns in the city. Chinatown, San Francisco ( disambiguation ). Since its establishment in 1848 , it has been highly important and influential in the history and culture of ethnic Chinese immigrants in North America .. North America. North America. Chinese. Han Chinese. ethnic Chinese immigrants. Overseas Chinese. Chinatown is an enclave that continues to retain its own customs , languages , places of worship , social clubs , and identity .. Chinatown. Chinatown. enclave. Ethnic enclave. places of worship. place of worship. There are two hospitals , numerous parks and squares , a post office , and other infrastructure .. While recent immigrants and the elderly choose to live in here because of the availability of affordable housing and their familiarity with the culture , the place is also a major tourist attraction , drawing more visitors annually than the Golden Gate Bridge .. tourist attraction. tourist attraction. Golden Gate Bridge. Golden Gate Bridge
related.