Task: Question Answering
Input (English): Context: Peroz I (Middle Persian: ; New Persian:  "Pirouz", lit. "the Victor") was the eighteenth king of the Sasanian Empire, who ruled from 459 to 484. Peroz I was the eldest son of Yazdegerd II (438457)., 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., Yazdegerd II ("Yazdkird", meaning "made by God"), was the sixteenth Sasanian emperor of Iran. He was the successor and son of Bahram V (420438) and reigned from 438 to 457. His reign was marked by wars against the Byzantine Empire in the west and the Hephthalite Empire in the east, as well as by his efforts and attempts to impose Zoroastrianism on the largest religious minority within the empire, namely the Christians., The Sasanian Empire (or ), also known as Sassanian, Sasanid, Sassanid or Neo-Persian Empire), known to its inhabitants as rnshahr in Middle Persian, was the last imperial dynasty in Persia (Iran) before the rise of Islam, ruled by and named after the Sasanian dynasty from 224 to 651 AD. The Sasanian Empire, which succeeded the Parthian Empire, was recognized as one of the leading world powers alongside its neighboring arch-rival the Roman-Byzantine Empire, for a period of more than 400 years., Persian Empire refers to any of a series of imperial dynasties centered in Persia (modernday Iran). The first of these was the Achaemenid Empire established by Cyrus the Great in 550 BC with the conquest of Median, Lydian and Babylonian empires. It covered much of the Ancient world when it was conquered by Alexander the Great. Several later dynasties "claimed to be heirs of the Achaemenids". Persia was then ruled by the Parthian Empire which supplanted the Hellenistic Seleucid Empire, and then by the Sassanian Empire which ruled up until mid 7th century., The Parthian Empire (247 BC  224 AD), also known as the Arsacid Empire, was a major Iranian political and cultural power in ancient Iran and Iraq. Its latter name comes from Arsaces I of Parthia who, as leader of the Parni tribe, founded it in the mid-3rd century BC when he conquered the region of Parthia in Iran's northeast, then a satrapy (province) in rebellion against the Seleucid Empire. Mithridates I of Parthia (r. "c". 171138 BC) greatly expanded the empire by seizing Media and Mesopotamia from the Seleucids. At its height, the Parthian Empire stretched from the northern reaches of the Euphrates, in what is now central-eastern Turkey, to eastern Iran. The empire, located on the Silk Road trade route between the Roman Empire in the Mediterranean Basin and the Han Empire of China, became a center of trade and commerce., Islam (' ;) is a religion articulated by the Quran, a text considered by its adherents to be the verbatim word of God ('), and, for the vast majority of adherents, the teachings and normative example (called the "sunnah", composed of accounts called "hadith") of Muhammad (5708 June 632 CE). It is the world's second-largest religion and the fastest-growing major religion in the world, with over 1.7 billion followers or 23% of the global population, known as Muslims. Islam is an Abrahamic monotheistic religion that upholds that God is one and incomparable and that the purpose of existence is to worship God. Muslims consider Muhammad to be the last prophet of God., Balash ( Persian :     ) , ( in the Greek authors , Balas ; the later form of the name Vologases ) , was the nineteenth king of the Sasanian Empire from 484 to 488 . He was the brother and successor of Peroz I ( 457 -- 484 ) , who had died in a battle against the Hephthalites who invaded Iran from the east ., Subject: balash, Relation: father, Options: (A) alexander the great (B) arch (C) arsaces i of parthia (D) bahram v (E) cyrus the great (F) muhammad (G) peroz i (H) persian gulf (I) yazdegerd ii
Output (English): yazdegerd ii