You will be given a definition of a task first, then some input of the task.
In this task, you are given a context, a subject, a relation, and many options. Based on the context, from the options select the object entity that has the given relation with the subject. Answer with text (not indexes).

Context: Azerbaijan, officially the Republic of Azerbaijan, is a country in the South Caucasus region, situated at the crossroads of Southwest Asia and Southeastern Europe. It is bounded by the Caspian Sea to the east, Russia to the north, Georgia to the northwest, Armenia to the west and Iran to the south. The exclave of Nakhchivan is bounded by Armenia to the north and east, Iran to the south and west, while having an 8 km border with Turkey in the north west., The Kara Koyunlu or Qara Qoyunlu, also called the Black Sheep Turkomans, were a Shi'a Oghuz Turkic tribal federation that ruled over the territory comprising present-day Azerbaijan, Armenia (1406), northwestern Iran, eastern Turkey, and northeastern Iraq from about 1375 to 1468., Qara Iskander ibn Yusuf ruled the Kara Koyunlu or Black Sheep Turcoman tribe from 1420 - 1436 . His struggles with the Timurid ruler Shah Rukh show that he was a brave leader , but he was not able to continue developing what he inherited from his father Qara Yusuf and his reign saw the decline and attenuation of the Kara Koyunlu ., Iran (, also , ; ' ), also known as Persia, officially the Islamic Republic of Iran (' ), is a sovereign state in Western Asia. It is bordered to the northwest by Armenia, the "de facto" Nagorno-Karabakh Republic, and Azerbaijan; to the north by the Caspian Sea; to the northeast by Turkmenistan; to the east by Afghanistan and Pakistan; to the south by the Persian Gulf and the Gulf of Oman; and to the west by Turkey and Iraq. Comprising a land area of , it is the second-largest country in the Middle East and the 18th-largest in the world. With 82.8 million inhabitants, Iran is the world's 17th-most-populous country. It is the only country with both a Caspian Sea and an Indian Ocean coastline. The country's central location in Eurasia and Western Asia, and its proximity to the Strait of Hormuz, make it of great geostrategic importance. Tehran is the country's capital and largest city, as well as its leading economic center., Iraq (, or ; '; '), officially known as the Republic of Iraq ('; ') is a country in Western Asia, bordered by Turkey to the north, Iran to the east, Kuwait to the southeast, Saudi Arabia to the south, Jordan to the southwest, and Syria to the west. The capital, and largest city, is Baghdad. The main ethnic groups are Arabs and Kurds; others include Assyrians, Turkmen, Shabakis, Yazidis, Armenians, Mandeans, Circassians, and Kawliya. Around 95% of the country's 36 million citizens are Muslims, with Christianity, Yarsan, Yezidism, and Mandeanism also present. The official languages of Iraq are Arabic and Kurdish., "Abu Nasr" Qara Yusuf Nuyan (died 1420) was the ruler of the Kara Koyunlu dynasty (or "Black Sheep Turkomans") from c.1388 to 1420, although his reign was interrupted by Tamerlane's invasion (14001405). He was the son of Qara Muhammad., Subject: qara iskander, Relation: date_of_birth, Options: (A) 1388 (B) 1400 (C) 1406 (D) 1420 (E) 8 (F) 95
Output:
1400