With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: San Francisco is the headquarters of multiple Internet-based companies.
text_B: Suru -LRB- سورو , also Romanized as Suru ; also known as Sorow -RRB- is a village in Howmeh Rural District , in the Central District of Deyr County , Bushehr Province , Iran .. Province. Provinces of Iran. Bushehr. Bushehr Province. County. Counties of Iran. Deyr. Deyr County. Central. Central District ( Deyr County ). Rural District. Rural Districts of Iran. Howmeh. Howmeh Rural District ( Deyr County ). Howmeh Rural District. Howmeh Rural District ( Deyr County ). Central District. Central District ( Deyr County ). Deyr County. Deyr County. Bushehr Province. Bushehr Province. Iran. Iran. At the 2006 census , its population was 83 , in 20 families .
not_related.