Answer the following question: Information:  - The Persian Gulf is a mediterranean sea in Western Asia. The body of water is an extension of the Indian Ocean (Gulf of Oman) through the Strait of Hormuz and lies between Iran to the northeast and the Arabian Peninsula to the southwest. The Shatt al-Arab river delta forms the northwest shoreline.  - An expatriate (often shortened to expat) is a person temporarily or permanently residing, as an immigrant, in a country other than that of their citizenship. The word comes from the Latin terms "ex" ("out of") and "patria" ("country, fatherland").  - Dubai (; "") is the most populous city in the United Arab Emirates (UAE). It is located on the southeast coast of the Persian Gulf and is the capital of the Emirate of Dubai, one of the seven emirates that make up the country. Abu Dhabi and Dubai are the only two emirates to have veto power over critical matters of national importance in the country's legislature. The city of Dubai is located on the emirate's northern coastline and heads up the Dubai-Sharjah-Ajman metropolitan area. Dubai is to host World Expo 2020.  - A city is a large and permanent human settlement. Although there is no agreement on how a city is distinguished from a town in general English language meanings, many cities have a particular administrative, legal, or historical status based on local law.  - A skyscraper is a tall, continuously habitable building having multiple floors. When the term was originally used in the 1880s it described a building of 10 to 20 floors but now describes one of at least 40-50 floors. Mostly designed for office, commercial and residential uses a skyscraper can also be called a high-rise, but the term skyscraper is often used for buildings higher than . For buildings above a height of , the term "Supertall" can be used, while skyscrapers reaching beyond are classified as "Megatall".  - Abu Dhabi (US , UK ; "" ) is the capital and the second most populous city of the United Arab Emirates (the most populous being Dubai), and also capital of the Emirate of Abu Dhabi, the largest of the UAE's seven emirates. Abu Dhabi lies on a T-shaped island jutting into the Persian Gulf from the central western coast. The city proper had a population of 1.5 million in 2014.  - The Emirate of Dubai, is one of the seven emirates of the United Arab Emirates.  - Ajman ("") is the capital of the emirate of Ajman in the United Arab Emirates, located along the Persian Gulf.  - Western Asia, West Asia, Southwestern Asia or Southwest Asia is the westernmost subregion of Asia. The concept is in limited use, as it significantly overlaps with the Middle East (or Near East), the main difference being the exclusion of Egypt (which would be counted as part of North Africa). The term is sometimes used for the purposes of grouping countries in statistics.  - Najd Tower was a planned 340 metre ( 1,115 ft ) tall , futuristic skyscraper with 82 floors and 496 rooms in Dubai , United Arab Emirates . Construction began in 2005 , then became on - hold . Later , it was cancelled in 2009 . If built , construction would have been completed in 2008 .  - An emirate is a political territory that is ruled by a dynastic Islamic monarch styled emir. It also means "principality".  - The United Arab Emirates ('), sometimes simply called the Emirates (') or the UAE, is a federal absolute monarchy in Western Asia at the southeast end of the Arabian Peninsula on the Persian Gulf, bordering Oman to the east and Saudi Arabia to the south, as well as sharing maritime borders with Qatar to the west and Iran to the north. In 2013, the UAE's population was 9.2 million, of which 1.4 million are Emirati citizens and 7.8 million are expatriates.  - Saudi Arabia, officially known as the Kingdom of Saudi Arabia (KSA), is an Arab sovereign state in Western Asia constituting the bulk of the Arabian Peninsula. With a land area of approximately , Saudi Arabia is geographically the fifth-largest state in Asia and second-largest state in the Arab world after Algeria. Saudi Arabia is bordered by Jordan and Iraq to the north, Kuwait to the northeast, Qatar, Bahrain, and the United Arab Emirates to the east, Oman to the southeast, and Yemen to the south. It is separated from Israel and Egypt by the Gulf of Aqaba. It is the only nation with both a Red Sea coast and a Persian Gulf coast, and most of its terrain consists of arid desert or barren landforms.  - Sharjah ("") is the third largest and third most populous city in the United Arab Emirates, forming part of the Dubai-Sharjah-Ajman metropolitan area. It is located along the southern coast of the Persian Gulf on the Arabian Peninsula.  - The Arabian Peninsula, simplified Arabia ("", « Arabian island ») is a peninsula of Western Asia situated northeast of Africa on the Arabian plate. From a geological perspective, it is considered a subcontinent of Asia.  - 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.  - Qatar (, or ; ' ; local vernacular pronunciation: ), officially the State of Qatar ('), is a sovereign country located in Western Asia, occupying the small Qatar Peninsula on the northeastern coast of the Arabian Peninsula. Its sole land border is with Saudi Arabia to the south, with the rest of its territory surrounded by the Persian Gulf. A strait in the Persian Gulf separates Qatar from the nearby island country of Bahrain, as well as sharing maritime borders with the United Arab Emirates and Iran.  - Oman (; ' ), officially the Sultanate of Oman, is an Arab country on the southeastern coast of the Arabian Peninsula. Holding a strategically important position at the mouth of the Persian Gulf, the nation is bordered by the United Arab Emirates to the northwest, Saudi Arabia to the west, and Yemen to the southwest, and shares marine borders with Iran and Pakistan. The coast is formed by the Arabian Sea on the southeast and the Gulf of Oman on the northeast. The Madha and Musandam exclaves are surrounded by the UAE on their land borders, with the Strait of Hormuz (which it shares with Iran) and Gulf of Oman forming Musandam's coastal boundaries.    After reading the paragraphs above, choose the best answer for the entity that related to 'najd tower' with the relationship of 'instance of'.  Choices: - 1  - absolute monarchy  - area  - body of water  - building  - capital  - city  - coast  - concept  - country  - emirate  - gulf  - iran  - islamic republic  - island  - language  - law  - mediterranean sea  - metropolitan  - monarch  - monarchy  - part  - peninsula  - person  - perspective  - republic  - river delta  - sea  - seven  - sharing  - skyscraper  - state  - statistics  - status  - subcontinent  - subregion  - sultanate  - terrain  - territory  - town  - two  - water  - word  - yemen
Answer:
building