Question: Who is the mother of Tsarevich Ivan Ivanovich of the country where a bombing occurred in the system that Teatralnaya is part of?

full_context: Document 1: Jaish-e-Mohammed: An informant, posing as a member of Jaish-e-Mohammed, helped police to arrest four people allegedly plotting to bomb a New York City synagogue as well as to shoot Stinger missiles at military aircraft in the United States. The arrest of the four took place in May 2009. One of the four, by the name of James Cromitie, allegedly expressed the desire to join Jaish-e-Mohammed. This expression allegedly took place approximately a year prior to this arrest.
Document 2: Boston: On April 15, 2013, two Chechen Islamist brothers exploded two bombs near the finish line of the Boston Marathon, killing three people and injuring roughly 264.
Document 3: Houston: The Houston Theater District, located downtown, is home to nine major performing arts organizations and six performance halls. It is the second-largest concentration of theater seats in a downtown area in the United States. Houston is one of few United States cities with permanent, professional, resident companies in all major performing arts disciplines: opera (Houston Grand Opera), ballet (Houston Ballet), music (Houston Symphony Orchestra), and theater (The Alley Theatre). Houston is also home to folk artists, art groups and various small progressive arts organizations. Houston attracts many touring Broadway acts, concerts, shows, and exhibitions for a variety of interests. Facilities in the Theater District include the Jones Hall—home of the Houston Symphony Orchestra and Society for the Performing Arts—and the Hobby Center for the Performing Arts.
Document 4: List of Russian monarchs: The Time of Troubles came to a close with the election of Michael Romanov as Tsar in 1613. Michael officially reigned as Tsar, though his father, the Patriarch Philaret (died 1633) initially held the real power. However, Michael's descendents would rule Russia, first as Tsars and later as Emperors, until the Russian Revolution of 1917. Peter the Great (reigned 1682 - 1725), a grandson of Michael Romanov, reorganized the Russian state along more Western lines, establishing the Russian Empire in 1721.
Document 5: Houston: The Theater District is a 17-block area in the center of downtown Houston that is home to the Bayou Place entertainment complex, restaurants, movies, plazas, and parks. Bayou Place is a large multilevel building containing full-service restaurants, bars, live music, billiards, and Sundance Cinema. The Bayou Music Center stages live concerts, stage plays, and stand-up comedy. Space Center Houston is the official visitors' center of NASA's Lyndon B. Johnson Space Center. The Space Center has many interactive exhibits including moon rocks, a shuttle simulator, and presentations about the history of NASA's manned space flight program. Other tourist attractions include the Galleria (Texas's largest shopping mall, located in the Uptown District), Old Market Square, the Downtown Aquarium, and Sam Houston Race Park.
Document 6: 2004 Madrid train bombings: The 2004 Madrid train bombings (also known in Spain as 11-M) were nearly simultaneous, coordinated bombings against the Cercanías commuter train system of Madrid, Spain, on the morning of 11 March 2004 – three days before Spain's general elections. The explosions killed 193 people and injured around 2,000. The bombings constituted the deadliest terrorist attack carried out in the history of Spain and the deadliest in Europe since the 1988 bombing of Pan Am Flight 103 over Lockerbie, Scotland. The official investigation by the Spanish judiciary found that the attacks were directed by an al-Qaeda terrorist cell, although no direct al-Qaeda participation has been established. Although they had no role in the planning or implementation, the Spanish miners who sold the explosives to the terrorists were also arrested.
Document 7: Mexico City: Other popular sites for pop-artist performances include the 3,000-seat Teatro Metropolitan, the 15,000-seat Palacio de los Deportes, and the larger 50,000-seat Foro Sol Stadium, where popular international artists perform on a regular basis. The Cirque du Soleil has held several seasons at the Carpa Santa Fe, in the Santa Fe district in the western part of the city. There are numerous venues for smaller musical ensembles and solo performers. These include the Hard Rock Live, Bataclán, Foro Scotiabank, Lunario, Circo Volador and Voilá Acoustique. Recent additions include the 20,000-seat Arena Ciudad de México, the 3,000-seat Pepsi Center World Trade Center, and the 2,500-seat Auditorio Blackberry.
Document 8: Dmitry Borisovich: Dmitry Borisovich (; 11 September 1253, Rostov – 1294, Rostov) was a Russian nobleman. He was the eldest of the three sons of Prince Rostov Boris Vasylkovych from his marriage to Princess Maria Yaroslavna of Murom. He was Prince of Rostov (1278–1286 and 1288–1294) and Prince of Uglich (1285–1288).
Document 9: Grand Duchess Xenia Alexandrovna of Russia: Grand Duchess Xenia Alexandrovna of Russia (; – 20 April 1960) was the elder daughter and fourth child of Tsar Alexander III of Russia and Empress Maria Feodorovna of Russia (née Princess Dagmar of Denmark) and the sister of Emperor Nicholas II. She married a cousin, Grand Duke Alexander Mikhailovich of Russia, with whom she had seven children. She was the mother-in-law of Felix Yusupov and a cousin of Grand Duke Dmitri Pavlovich of Russia who, together, killed Grigori Rasputin, holy healer to her nephew, the haemophiliac Tsarevich Alexei Nikolaevich of Russia. During her brother's reign she recorded in her diary and letters increasing concern about his rule. After the fall of the monarchy in February 1917, she fled Russia, eventually settling in the United Kingdom. Her grandson Prince Andrew Andreevich has been a head of the Romanov Family since December 2016.
Document 10: Elevator: Stage lifts and orchestra lifts are specialized elevators, typically powered by hydraulics, that are used to raise and lower entire sections of a theater stage. For example, Radio City Music Hall has four such elevators: an orchestra lift that covers a large area of the stage, and three smaller lifts near the rear of the stage. In this case, the orchestra lift is powerful enough to raise an entire orchestra, or an entire cast of performers (including live elephants) up to stage level from below. There's a barrel on the background of the image of the left which can be used as a scale to represent the size of the mechanism
Document 11: August 2004 Moscow Metro bombing: 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.
Document 12: Kotlyakovskoya Cemetery bombing: The Kotlyakovskoye Cemetery bombing was an attack on a funeral service in Moscow which killed fourteen people on November 11, 1996. The bombing, carried out via remote control, targeted members of an Afghan War veterans support group as well as their families. The victims were attending the funeral of Mikhail Lihodey, the former president of the veterans group who had been killed with his bodyguard in 1994.
Document 13: Teatralnaya (Moscow Metro): Teatralnaya (, ) is an underground metro station on the Zamoskvoretskaya line of the Moscow Metro, named for the nearby Teatralnaya Square, the location of numerous theaters, including the famed Bolshoi Theatre. The station is unique in that it does not have its own entrance halls. The north escalator leads to Okhotniy Ryad and the south escalator to Ploshchad Revolyutsii.
Document 14: Tsarevich Dmitry Ivanovich of Russia (1552–1553): 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.
Document 15: Tsarevna Catherine Ivanovna of Russia: Tsarevna Catherine Ivanovna of Russia (20 October 1691 – 14 June 1733) was a daughter of Tsar Ivan V and Praskovia Saltykova, eldest sister of Empress Anna of Russia and niece of Peter the Great. By her marriage, she was a Duchess of Mecklenburg-Schwerin.
ground_truth: Anastasia Romanovna
sub_queries: Teatralnaya >> part of Answer: Moscow Metro
August 2004 Moscow Metro bombing >> country Answer: Russia
Tsarevich Ivan Ivanovich of Russia >> mother Answer: Anastasia Romanovna