Question: Küçüksu Palace and Istanbul Cevahir, are located in Istanbul, in which country?
Context: Şişli—Mecidiyeköy is an underground rapid transit station on the M2 line of the Istanbul Metro.  It is located in central Şişli under Büyükdere Avenue.  Şişli—Mecidiyeköy was opened on 16 September 2000 and is one of the six original stations on the M2 line.  It has an island platform serviced by two tracks.  An out-of-system connection to Metrobus service on the O-1 is available.  The station has exits to Mecidiyeköy Square, Ortaklar Avenue and an underground passageway to Istanbul Cevahir mall. Hagia Irene or Hagia Eirene (Ancient Greek: Ἁγία Εἰρήνη , Byzantine ] , "Holy Peace", Turkish: "Aya İrini" ), sometimes known also as Saint Irene, is a Greek Eastern Orthodox church located in the outer courtyard of Topkapı Palace in Istanbul, Turkey.  It is one of the few churches in Istanbul that has not been converted into a mosque.  The Hagia Irene today operates as a museum and concert hall. Istanbul Sirkeci Terminal, also known as Istanbul Terminal (Turkish: "Sirkeci Garı" ), is a railway terminal in Istanbul.  The terminal is located on the tip of Istanbul's historic peninsula right next to the Golden Horn and just northwest of Gülhane Park and the famous Topkapı Palace.  Sirkeci Terminal, along with Haydarpaşa Terminal on the other side of the Bosphorus, are Istanbul's two intercity and commuter railway terminals.  Built in 1890 by the Oriental Railway as the eastern terminus of the world-famous Orient Express, Sirkeci Terminal has become a symbol of the city.  As of 19 March 2013 service to the station had been indefinitely suspended due to the rehabilitation of the existing line between Kazlıçeşme and Halkalı for the new Marmaray commuter rail line.  On 29 October 2013, a new underground station opened to the public and is currently serviced by Marmaray trains travelling across the Bosphorus.  Sirkeci Terminal has a total of 4 platforms (3 above, 1 underground) with 7 tracks (5 above, 2 underground).  Formerly, commuter trains to Halkalı would depart from tracks 2, 3 and 4 while regional trains to Kapıkule, Edirne and Uzunköprü along with international trains to Bucharest, Sofia and Belgrade would depart from tracks 1 and 5. Küçüksu Palace or Küçüksu Pavilion, a.k.a. Göksu Pavilion, (Turkish: "Küçüksu Kasrı" ) is a summer palace in Istanbul, Turkey, situated in the Küçüksu neighborhood of Beykoz district on the Asian shore of the Bosphorus between Anadoluhisarı and the Fatih Sultan Mehmet Bridge.  The tiny palace was used by Ottoman sultans for short stays during country excursions and hunting. Şişli Greek Orthodox Cemetery (Turkish: "Şişli Rum Ortodoks Mezarlığı" ), also known as "Şişli Eastern Orthodox Cemetery", is a Christian cemetery in Istanbul, Turkey.  The burial ground is the final resting place of people professing the Orthodox faith in Istanbul.  The cemetery is located in Şişli district of Istanbul just across the Cevahir Mall. Yıldız (literally "a star" in Turkish) is a neighbourhood located in the Beşiktaş district of Istanbul, Turkey.  The neighbourhood comprises some of Istanbul's well-known historical locations, such as Yıldız Park and Yıldız Palace, the second largest palace in Istanbul.  Yıldız has a population of approximately 6,000. Çağlayan is a neighbourhood of Kağıthane, Istanbul, Turkey.  The Istanbul Çağlayan Justice Palace is located here. Gülhane Park (Turkish: "Gülhane Parkı" , "Rosehouse Park"; from Persian: "Gulkhāna", "house of flowers") is a historical urban park in the Eminönü district of Istanbul, Turkey; it is located adjacent to and on the grounds of the Topkapı Palace.  The south entrance of the park sports one of the larger gates of the palace.  It is the oldest and one of the most expansive public parks in Istanbul. Istanbul Cevahir Shopping and Entertainment Centre, also known as Şişli Kültür ve Ticaret Merkezi (Şişli Culture and Trade Centre) is a modern shopping mall located on the Büyükdere Avenue in the Şişli district of Istanbul, Turkey.  Opened on 15 October 2005, Istanbul Cevahir was the largest shopping mall in Europe in terms of gross leasable area between 2005 and 2011, and is one of the largest in the world. Istanbul Sapphire, or Sapphire, is a skyscraper, and as of 2016, the tallest building in Istanbul and Turkey, located in the central business district of Levent.  Istanbul Sapphire was the 4th tallest building in Europe when its construction was completed in 2010.  It is the country's first ecological skyscraper.  Sapphire rises 54 floors above ground level, and boasts an above-ground roof height of 238 meters: the building has an overall structural height of 261 meters including its spire, which is part of the design and not a radio antenna.  Designed by Tabanlıoğlu Architects, it is a shopping and luxury residence mixed-use development managed by Kiler GYO.
Answer: Turkey