Information: - An emperor (through Old French "empereor" from ) is a monarch, usually the sovereign ruler of an empire or another type of imperial realm. Empress, the female equivalent, may indicate an emperor's wife ("empress consort"), mother ("empress dowager"), or a woman who rules in her own right ("empress regnant"). Emperors are generally recognized to be of a higher honour and rank than kings. In Europe the title of Emperor was, since the Middle Ages, considered equal or almost equal in dignity to that of Pope, due to the latter's position as visible head of the Church and spiritual leader of Western Europe. The Emperor of Japan is the only currently reigning monarch whose title is translated into English as "Emperor". - For the Portuguese infanta daughter of Sancho I , see : Infanta Constanca of Portugal Infanta Constance of Portugal ( pt : Constanca ; 3 January 1290 -- Sahagun , 18 November 1313 ; Portuguese pronunciation : ( kots ) ; English : Constance ) , was a Portuguese infanta ( princess ) by birth and Queen consort of Castile by marriage . She was the eldest child and only daughter of King Denis of Portugal and his wife Elizabeth of Aragon , later Saint . - Brunei, officially the Nation of Brunei, the Abode of Peace (Jawi: ), is a sovereign state located on the north coast of the island of Borneo in Southeast Asia. Apart from its coastline with the South China Sea, the country is completely surrounded by the state of Sarawak, Malaysia. It is separated into two parts by the Sarawak district of Limbang. Brunei is the only sovereign state completely on the island of Borneo; the remainder of the island's territory is divided between the nations of Malaysia and Indonesia. Brunei's population was 408,786 in July 2012. - Bulgaria (tr. '), officially the Republic of Bulgaria (tr. '), is a country in southeastern Europe. It is bordered by Romania to the north, Serbia and Macedonia to the west, Greece and Turkey to the south, and the Black Sea to the east. With a territory of , Bulgaria is Europe's 16th-largest country. - A title is a prefix or suffix added to someone's name in certain contexts. It may signify either veneration, an official position or a professional or academic qualification. In some languages, titles may be inserted before a last name (for example, "Graf" in German, Cardinal in Catholic usage or clerical titles such as Archbishop). Some titles are hereditary. - A queen consort is the wife of a reigning king (or an empress consort in the case of an emperor). In Brunei, the wife of the Sultan is known as a "Raja Isteri" with prefix "Pengiran Anak", equivalent with queen consort in English, as were the consorts of tsars when Bulgaria was still a monarchy. A queen consort usually shares her husband's social rank and status. She holds the feminine equivalent of the king's monarchical titles, but historically, she does not share the king's political and military powers. A queen regnant is a queen in her own right with all the powers of a monarch, who (usually) has become queen by inheriting the throne upon the death of the previous monarch. - Sahagun is a town in the province of Leon, Spain. It is the main town of the Leonese section of the Tierra de Campos district. Given the information above, choose from the list below the object entity that exhibits the relation 'country of citizenship' with the subject 'constance of portugal'. Choices: - academic - brunei - bulgaria - greece - japan - macedonia - realm - romania - serbia - spain
The answer to this question is:
spain