Q: Information: - Polotsk or Polatsk is a historical city in Belarus, situated on the Dvina River. It is the center of the Polatsk Raion in Vitebsk Voblast. Its population is more than 80,000 people. It is served by Polotsk Airport and during the Cold War was home to Borovitsy air base. - Borovitsy (also Borovitsi, Polotsk Northwest, and Borovtsy) is an air base in Belarus, located 16km northwest of Polatsk. It is a Cold War air base with sprawling taxiway area and pads for about 40 aircraft. During the 1960s it was probably home to attack aircraft regiments, but by the 1980s it was served only by the 276 BVP (276th Combat Helicopter Regiment) flying Mi-8 and Mi-24 helicopters. - Rogvolod (c. 920 978) was first chronicled prince of Polatsk (945978). In the Russian Primary Chronicle, he is known as , probably a slavicized version of the Old Norse name "Ragnvald". He came from overseas (i.e., from Scandinavia or Southern Baltic) and established himself at Polatsk in the mid-10th century. According to the Russian Primary Chronicle, Vladimir the Great sought an alliance with him in 980 by marrying his daughter Rogneda, but she insultingly refused, prompting Vladimir to attack Rogvolod and his sons and kill them, after which he forcibly took Rogneda as his wife. - Izyaslav ( Russian : , Belarusian : ) was the son of Vladimir I of Kiev and Rogneda of Polotsk . Following Norse tradition , Izyaslav was sent with his mother to rule her homeland . There is also a legend that Rogneda tried to get Izyaslav to slay his father . Despite possibly going against the will of his father , Izyaslav was able to continue his rule in Polotsk . He was first to make Polotsk autonomous from the Grand Duke of Kiev passing his title to his descendants after his death . His principality carried a wide degree of autonomy that later was passed and to his descendants as well . His glory was commemorated after an established city that was named after him . Izyaslav died at the young age of about 23 , in 1001 , surviving his mother but predeceasing his father Vladimir of Kiev , thus excluding his descendants from ever succeeding the Kievan throne , according to the so - called '' ladder succession '' . The name of Izyaslav 's spouse is unknown . He had two sons : Bryachislav of Polotsk and Vseslav . Both were certainly minor at the time of his father 's death . Vseslav died , still in childhood , in 1003 , while Bryachislav survived to continue the Polotsk dynasty and to challenge the authority of his uncle Yaroslav the Wise . - Rogneda of Polotsk (9621002) is the Slavic name for Ragnhild, whose father Ragnvald (Slavic: Rogvolod) came from Scandinavia and established himself at Polatsk in the mid-10th century. After reading the paragraphs above, choose the best answer for the entity that related to 'izyaslav of polotsk' with the relationship of 'father'. Choices: - combat - rogvolod - vladimir the great
A: vladimir the great

Q: Information: - Paul Leroy Robeson (April 9, 1898 January 23, 1976) was an American bass singer and actor who became involved with the Civil Rights Movement. At Rutgers College, he was an outstanding American football player, and then had an international career in singing, with a distinctive, powerful, deep bass voice, as well as acting in theater and movies. He became politically involved in response to the Spanish Civil War, fascism, and social injustices. His advocacy of anti-imperialism, affiliation with communism, and criticism of the United States government caused him to be blacklisted during the McCarthy era. Ill health forced him into retirement from his career. - The 1923 Akron Pros season was their fourth in the league . The team failed to improve on their previous output of 3 -- 5 -- 2 , winning only one game . They tied for sixteenth place in the league . - Frederick Douglass "Fritz" Pollard (January 27, 1894 May 11, 1986) was the first African American head coach in the National Football League (NFL). Pollard along with Bobby Marshall were the first two African American players in the NFL in 1920. Football pioneer Walter Camp ranked Pollard as "one of the greatest runners these eyes have ever seen." - The Akron Pros were a professional football team that played in Akron, Ohio from 1908 to 1926. The team originated in 1908 as a semi-pro team named the Akron Indians, but later became Akron Pros in 1920 as the team set out to become a charter member of the American Professional Football Association. Fritz Pollard, the first black head coach in the NFL, co-coached the Akron Pros in 1921. Paul Robeson played for the team in 1921 as well. He was among the earliest stars of professional football, before football became segregated from 1934 to 1946. In 1926, the name was changed back to the Akron Indians, after the earlier semi-pro team. Due to financial problems, the team suspended operations in 1927 and surrendered its franchise the following year. After reading the paragraphs above, choose the best answer for the entity that related to '1923 akron pros season' with the relationship of 'sport'. Choices: - american football - football
A: american football