With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Afghanistan is the source of the Saffarid dynasty which ruled from 438 to 439 CE.
text_B: The Saffarid dynasty was a Muslim Persianate dynasty from Sistan that ruled over parts of eastern Iran , with its capital at Zaranj -LRB- a city now in southwestern Afghanistan -RRB- .. Zaranj. Zaranj. Afghanistan. Name of Afghanistan. Muslim. Muslim. Persianate. Persianate. Sistan. Sistan. eastern Iran. Greater Iran. Khorasan , Afghanistan and Sistan from 861 to 1003 .. Afghanistan. Name of Afghanistan. Sistan. Sistan. Khorasan. Greater Khorasan. The dynasty , of Persian origin , was founded by Ya ` qub bin Laith as-Saffar , born in 840 in a small town called Karnin -LRB- Qarnin -RRB- , which was located east of Zaranj and west of Bost , in what is now Afghanistan - a native of Sistan and a local ayyar , who worked as a coppersmith -LRB- saffar -RRB- before becoming a warlord .. Zaranj. Zaranj. Afghanistan. Name of Afghanistan. Persian. Persian languages. Sistan. Sistan. ayyar. ayyar. warlord. warlord. He seized control of the Sistan region and began conquering most of Iran and Afghanistan , as well as parts of Pakistan , Tajikestan and Uzbekistan .. Afghanistan. Name of Afghanistan. Sistan. Sistan. The Saffarids used their capital Zaranj as a base for an aggressive expansion eastward and westward .. Zaranj. Zaranj. They first invaded the areas south of the Hindu Kush in Afghanistan and then overthrew the Persian Tahirid dynasty , annexing Khorasan in 873 .. Afghanistan. Name of Afghanistan. Persian. Persian languages. Khorasan. Greater Khorasan. Hindu Kush. Hindu Kush. Tahirid dynasty. Tahirid dynasty. By the time of Ya ` qub 's death , he had conquered the Kabul Valley , Sindh , Tocharistan , Makran -LRB- Balochistan -RRB- , Kerman , Fars , Khorasan , and nearly reached Baghdad but then suffered a defeat by the Abbasids .. Khorasan. Greater Khorasan. Kabul Valley. Kabul. Sindh. Sindh. Tocharistan. Tocharistan. Makran. Makran. Kerman. Kerman. Fars. Fars Province. Baghdad. Baghdad. Abbasids. Abbasids. The Saffarid empire did not last long after Ya ` qub 's death .. His brother and successor , Amr bin Laith , was defeated at the Battle of Balkh against Ismail Samani in 900 .. Amr bin Laith. Amr bin Laith. Battle of Balkh. Battle of Balkh. Ismail Samani. Ismail Samani. Amr bin Laith was forced to surrender most of his territories to the new rulers .. Amr bin Laith. Amr bin Laith. The Saffarids were subsequently confined to their heartland of Sistan , with their role reduced to that of vassals of the Samanids and their successors .. Sistan. Sistan. Samanids. Samanids
related.