paragraph_text: The official investigation concluded that it was organized by the same group as the February 2004 Moscow metro bombing, as well as two previous terrorist attacks on bus stops in Voronezh, southern Russia, in 2004. The deaths included the bomber and her accomplice, Nikolay Kipkeev (Kipkeyev), the head of an Islamic militant group Karachay Jamaat from the republic of Karachay–Cherkessia, as the bomb apparently exploded prematurely while the two were standing in the entrance hall of the metro station.

paragraph_text: Ozerki () is a station on line 2 of the Saint Petersburg Metro, within the Ozerki historic district. It opened on 19 August 1988, and is between Udelnaya and Prospekt Prosvescheniya stations.

paragraph_text: The Enola Gay (/ ɪˈnoʊlə ˈɡeɪ /) is a Boeing B - 29 Superfortress bomber, named for Enola Gay Tibbets, the mother of the pilot, Colonel Paul Tibbets, who selected the aircraft while it was still on the assembly line. On 6 August 1945, during the final stages of World War II, it became the first aircraft to drop an atomic bomb. The bomb, code - named ``Little Boy '', was targeted at the city of Hiroshima, Japan, and caused unprecedented destruction. Enola Gay participated in the second atomic attack as the weather reconnaissance aircraft for the primary target of Kokura. Clouds and drifting smoke resulted in a secondary target, Nagasaki, being bombed instead.

paragraph_text: Count Ivan Ivanovich Tolstoy (1858—1916) was an Imperial Russian politician. He served as Vice President of the Russian Imperial Academy of Arts while Grand Duke Vladimir Alexandrovich was Academy President. He later served as Imperial Minister of Education in the Witte Government.

paragraph_text: 6998150000000000000 ♠ 1.5 × 10 -- 6998200000000000000 ♠ 2 × 10 17.4 -- 23.2 GWh The Little Boy atomic bomb dropped on Hiroshima on August 6, 1945, exploded with an energy of about 15 kilotons of TNT (63 TJ), and the Fat Man atomic bomb dropped on Nagasaki on August 9, 1945, exploded with an energy of about 20 kilotons of TNT (84 TJ). The modern nuclear weapons in the United States arsenal range in yield from 0.3 kt (1.3 TJ) to 1.2 Mt (5.0 PJ) equivalent, for the B83 strategic bomb.

paragraph_text: Metro-2 () is the informal name for a purported secret underground metro system which parallels the public Moscow Metro (known as Metro-1 when in comparison with Metro-2). The system was supposedly built, or at least started, during the time of Joseph Stalin and was codenamed D-6 (Д-6) by the KGB. It is supposedly still operated by the Main Directorate of Special Programmes and Ministry of Defence.

paragraph_text: Ivan Ivanovich Rerberg (October 4, 1869 – 1932, Moscow) was a Russian civil engineer, architect and educator active in Moscow in 1897–1932. Rerberg's input to present-day Moscow include Kiyevsky Rail Terminal, Central Telegraph building and the Administration building of Moscow Kremlin. Rerberg, a fourth member in a dynasty of engineers, was credited with innovative approach to structural frames and despised the title of an "architect", always signing his drafts "Engineer Rerberg".

paragraph_text: Wild Gals A Go-Go is an album by Acid Mothers Temple & The Melting Paraiso U.F.O., self-released in 1999. The album is presented as if it were the soundtrack to a Russian pornographic film by a director named Ivan Piskov.

paragraph_text: "I Go Back" is a song written and recorded by American country music artist Kenny Chesney. It was released in May 2004 as the third single from his 2004 album "When the Sun Goes Down". The song spent seven weeks at number 2 on the U.S. "Billboard" Hot Country Songs chart in mid-2004, behind "Live Like You Were Dying" by Tim McGraw.

paragraph_text: Ivan Ivanovich Artobolevskii (September 26 (9 October), 1905, Moscow, Russian Empire - 21 September 1977, Moscow, USSR ) was a Soviet scientist and engineer, academician of the Academy of Sciences of the USSR, and Hero of Socialist Labor.

paragraph_text: The 14 September 2004 Baghdad bombing was a suicide car bomb attack on a market, near a police headquarters, in Baghdad, the capital city of Iraq, on 14 September 2004, killing 47 people and wounding 114.

paragraph_text: He was educated with his elder brother John at Wellesley House and Eton College. He was 10 when their father, Lieutenant Colonel Ivan Cobbold, was killed in the Guards Chapel, London, on 19 June 1944 when a flying bomb (V1) hit the Chapel during the Sunday morning service.

paragraph_text: The 2004 Sinai bombings were three bomb attacks targeting tourist hotels in the Sinai Peninsula, Egypt, on 7 October 2004. The attacks left 34 people dead and 171 injured.

paragraph_text: Dmitri Ivanovich (; 11 October 155226 June 1553) was the first Tsarevich or Tsesarevich - the heir apparent - of the Tsardom of Russia, as the eldest son of Ivan the Terrible, or "Ivan IV of Russia" and his first Tsaritsa, Anastasia Romanovna. He was the third child and first son of the couple and died in infancy.

paragraph_text: Metro Tacuba is a station of the Mexico City Metro. It is located in the Tacuba district of the Miguel Hidalgo borough, to the west of downtown Mexico City. It lies along Lines 2 and 7.

paragraph_text: On 23 August 2013 two mosques were bombed in Tripoli, Lebanon. 47 people were killed and five hundred more injured in what has been called the "biggest and deadliest" bombing in Tripoli since the end of Lebanon's Civil War. and the bombings are widely considered to be part of the spillover of the Syrian Civil War into Lebanon.

paragraph_text: The Rizal Day bombings, also referred to as the December 30 bombings, were a series of bombings that occurred around Metro Manila in the Philippines on December 30, 2000. The explosions occurred in close succession within a span of a few hours. Twenty-two (22) fatalities were reported and around a hundred more suffered non-fatal injuries.

paragraph_text: Ivan Ivanovich Melnikov (; born 7 August 1950) is a Russian politician, Vice-Chairman of the Communist Party of the Russian Federation (CPRF), and First Vice-Chairman of the State Duma. He is a professor at Moscow State University.

paragraph_text: This is a list of the stations of the metro system of Bilbao, Basque Country, Spain. For further information on the network, see the Metro Bilbao page.

paragraph_text: Mathieu Razanakolona (born August 2, 1986) is a Malagasy-Canadian alpine skier, born to a Quebecois mother and a father from Madagascar, currently residing in Canada.

Question: Who is the mother of Tsarevich Ivan Ivanovich, of the country that experienced the August 2004 bombing of the transit system that includes the Metro-2?
Answer: Anastasia Romanovna