With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Led Zeppelin formed in the 1960s.
text_B: Heydarabad -LRB- حيدراباد , also Romanized as Heydarabad -RRB- is a village in Takht-e Jolgeh Rural District , in the Central District of Firuzeh County , Razavi Khorasan Province , Iran .. Province. Provinces of Iran. Razavi Khorasan. Razavi Khorasan Province. County. Counties of Iran. Firuzeh. Firuzeh County. Central. Central District ( Firuzeh County ). Rural District. Rural Districts of Iran. Takht-e Jolgeh. Takht-e Jolgeh Rural District. Takht-e Jolgeh Rural District. Takht-e Jolgeh Rural District. Central District. Central District ( Firuzeh County ). Firuzeh County. Firuzeh County. Razavi Khorasan Province. Razavi Khorasan Province. Iran. Iran. At the 2006 census , its population was 183 , in 47 families .
not_related.