Question: Where is the Blue Mosque located in the country where the town of Karacasu can be found?

full_context: Document 1: Üç Şerefeli Mosque: The Üç Şerefeli Mosque was commissioned by Ottoman sultan Murad II (1421–1444,1446– 1451), and built between 1438 and 1447. It is located in the historical center of the city, close to the Selimiye Mosque and Old Mosque. The name refers to unusual minaret with three balconies (Turkish: üç şerefeli).The architect of the mosque is not known. It is built of Burgaz limestone with a main dome that is 24 m in diameter. When first built the dome was the largest in any Ottoman building. The mosque was severely damaged by fire in 1732 and by an earthquake in 1748 but was repaired on the order of Mahmut I.The two blue and turquoise underglaze-painted tile panels in the tympana of the windows were probably produced by the same group of tilemakers who had decorated the Yeşil Mosque (1419–21) in Bursa where the tiles are signed as "the work of the masters of Tabriz" (ʿamal-i ustadan-i Tabriz). The running pattern of the Chinese influenced floral border tiles is similar to those in the small Muradiye Mosque in Edirne.In the Şakaiki Numaniye Taş Köprü Zade  relates how 'Certain accursed ones of no significance' were burnt to death by Mahmut Paşa who accidentally set fire to his beard in the process.
Document 2: Karacasu, Bolu: Karacasu is a belde (town) in the central district of Bolu Province, Turkey. It is situated far from Bolu to the north of Köroğlu Mountains. The population of Karacasu was 2,540 as of 2013. The town's economy depends on thermal springs.
Document 3: Mosque of the Martyrs: The Mosque of the Martyrs (), also popularly known as the Turkish Mosque, is a mosque in Baku, Azerbaijan, near the Martyrs' Lane. The mosque was built in the beginning of the 1990s with assistance of the Turkish government. The mosque currently is used as an official residence of religious attaché of the Turkish embassy. The mosque has been under construction since 2009.
Document 4: Karasu, Bartın: Karasu is a village in the District of Bartın, Bartın Province, Turkey. As of 2010, it had a population of 658 people.
Document 5: Belen, Tarsus: Belen is a village in Tarsus district of Mersin Province, Turkey. It is situated in the Taurus Mountains. Its distance to Tarsus is and to Mersin is . The population of Belen was 684 as of 2011. The area around Belen was populated in the Roman Empire era of the 2nd and 3rd centuries, evident from a necropolis area next to the village, but the village was founded during the Ottoman period. Main economic activities are agriculture animal breeding and poultry husbandry.
Document 6: Mihrimah Sultan Mosque (Edirnekapı): As built, the Mihrimah Sultan Mosque had a külliye which included (besides madrasah) a double hamman, türbe and a low row of shops under the terrace upon which the mosque was built, whose rents were intended to financially support the mosque complex.
Document 7: Daday: Daday is a town and district of the Kastamonu Province in the Black Sea region of Turkey. It is located at 30 km west of Kastamonu. According to the 2000 census, population of the district is 11,181 of which 4,625 live in the town of Daday. The district covers an area of , and the town lies at an elevation of . The terrain is mainly mountainous and covered with pine trees. The town is located in a valley on a small river. The economy is based primarily on agriculture and forestry products. Daday is known for its famous "etliekmek", the traditional food of the Kastamonu region.
Document 8: Sultan Ahmed Mosque: The Sultan Ahmed Mosque or Sultan Ahmet Mosque (Turkish: Sultan Ahmet Camii) is a historic mosque located in Istanbul, Turkey. A popular tourist site, the Sultan Ahmed Mosque continues to function as a mosque today; men still kneel in prayer on the mosque's lush red carpet after the call to prayer. The Blue Mosque, as it is popularly known, was constructed between 1609 and 1616 during the rule of Ahmed I. Its Külliye contains Ahmed's tomb, a madrasah and a hospice. Hand - painted blue tiles adorn the mosque's interior walls, and at night the mosque is bathed in blue as lights frame the mosque's five main domes, six minarets and eight secondary domes. It sits next to the Hagia Sophia, another popular tourist site.
Document 9: Kasar, Çine: Kasar is a village in the District of Çine, Aydın Province, Turkey. As of 2010 it had a population of 362 people.
Document 10: Talas, Kyrgyzstan: Talas is a town in northwestern Kyrgyzstan, located in the Talas River valley between two mountain ranges. Its area is , and its resident population was 32,886 in 2009. It is the administrative headquarters of Talas Region. The town was founded by East Slavic settlers in 1877. To the south is the Besh-Tash (‘five rocks’) valley with the Besh-Tash National Park.
Document 11: Ertuğrul Tekke Mosque: The Ertuğrul Tekke Mosque, (), is an Ottoman imperial mosque located in Yıldız neighbourhood, Serencebey rise of Beşiktaş district in Istanbul, Turkey. A late Ottoman period mosque, it is constructed as a külliye consisting of a tekke, guest house, türbe, fountain, and library in addition to the mosque.
Document 12: Hagia Sophia: Hagia Sophia (/ ˈhɑːɡiə soʊˈfiːə /; from the Greek: Αγία Σοφία, pronounced (aˈʝia soˈfia), ``Holy Wisdom ''; Latin: Sancta Sophia or Sancta Sapientia; Turkish: Ayasofya) was a Greek Orthodox Christian patriarchal basilica (church), later an imperial mosque, and is now a museum (Ayasofya Müzesi) in Istanbul, Turkey. From the date of its construction in 537 AD, and until 1453, it served as an Eastern Orthodox cathedral and seat of the Patriarch of Constantinople, except between 1204 and 1261, when it was converted by the Fourth Crusaders to a Roman Catholic cathedral under the Latin Empire. The building was later converted into an Ottoman mosque from 29 May 1453 until 1931. It was then secularized and opened as a museum on 1 February 1935. Famous in particular for its massive dome, it is considered the epitome of Byzantine architecture and is said to have`` changed the history of architecture''. It remained the world's largest cathedral for nearly a thousand years, until Seville Cathedral was completed in 1520.
Document 13: Çekerek: Çekerek is a town and district of Yozgat Province in the Central Anatolia region of Turkey. It is located in northeast of Yozgat province and it is 90 km (56 miles) far from there. According to 2013 census, population of the district is 23,699 of which 10,736 live in the town of Çekerek and remaining 12,963 people live in rural areas.
Document 14: Küre, Kastamonu: Küre is a town and district of the Kastamonu Province in the Black Sea region of Turkey. According to 2000 census, population of the district is 10,223 of which 3,880 live in the town of Küre. The district covers an area of , and the town lies, at an elevation of .
Document 15: Mihrimah Sultan Mosque (Edirnekapı): The  Mihrimah Sultan Mosque is a 16th century Ottoman mosque located in the Edirnekapı neighborhood near the Byzantine land walls of Istanbul, Turkey. It was commissioned by Mihrimah Sultan, the daughter of Suleiman the Magnificent and designed by the chief imperial architect Mimar Sinan. Sited on the peak of the Sixth Hill near the highest point of the city, the mosque is a prominent landmark in Istanbul.
ground_truth: Istanbul
sub_queries: Karacasu >> country Answer: Turkey
where is the blue mosque located in Turkey Answer: Istanbul