In this task, you're given a question, along with a context passage. The passage will not have a direct answer to the question, but can include some information and a clue for the answer. Assuming you can only obtain information about one entity in the passage, your job is to determine whether information from the passage can be used to answer the question. Indicate your choice as 'a' for Yes or 'b' for No.

Ex Input:
Question: How long had Ferdinand I been in power the year Coimbra fell? Passage:The history of the county of Portugal is traditionally dated from the reconquest of Portus Cale (Porto) by Vimara Peres in 868. He was named a count and given control of the frontier region between the Limia and Douro rivers by Alfonso III of Asturias. South of the Douro, another border county would be formed decades later when what would become the County of Coimbra was conquered from the Moors by Hermenegildo Guterres. This moved the frontier away from the southern bounds of the county of Portugal, but it was still subject to repeated campaigns from the Caliphate of Cordoba. The recapture of Coimbra by Almanzor in 987 again placed the County of Portugal on the southern frontier of the Leonese state for most of the rest of the first county's existence. The regions to its south were only again conquered in the reign of Ferdinand I of Leon and Castile, with Lamego falling in 1057, Viseu in 1058 and finally Coimbra in 1064.

Ex Output:
b

Ex Input:
Question: Who was the mayor of Stockholm the year Samuel-Cahn moved to Mandatory Palestine? Passage:Samuel-Cahn was born in Oslo, Norway. During the Nazi occupation of Norway, in 1942, her father, a rabbi, was warned that he would be arrested by the Germans. He refused to leave in order to try to support his community. In September, her father was ordered to report to the Gestapo office, where he was questioned and later sent to Auschwitz. Later that year, the Nazis were going to arrest the other Jews in Oslo, however Samuel-Cahn's family were moved by members of the underground, Ingebjrg Sletten-Fosstvedt and Sigrid Helliesen Lund, to safety and later to a refugee camp in neutral Sweden. In order to cross the border, Samuel-Cahn and the rest of her family had to hide in trucks used to transport potatoes. In Stockholm, Samuel-Cahn's family found out that her father had been killed in Auschwitz. In 1946, Samuel-Cahn, her mother and brothers moved to Mandatory Palestine (part of which later became Israel).

Ex Output:
a

Ex Input:
Question: Where did Henri Le Rond live at the end of World War I? Passage:Consequently, to the end of World War I in 1918 various proposals emerged defining the division of Upper Silesia. At the Paris Peace Conference a commission for Polish affairs was created to prepare proposals for Polish borders. In their first two proposals (of 27 March 1919 and of 7 May 1919) most of the future province was ceded, together with the region of Oppeln, to Poland. Yet that was not accepted by the Big Four, and following David Lloyd George's suggestion, the plebiscite was organized. Before it took place on 20 March 1921, two Silesian Insurrections instigated by Polish inhabitants of the area were organized. After the referendum, in which Poland had 41% of the votes, a plan of division was created that divided Upper Silesia. Following this, the Third Silesian Uprising took place. The Inter-Allied Commission on Upper Silesia, headed by the French general Henri Le Rond suggested a new plan for division of the area, which was prepared by an ambassadors commission in Paris on 20 October 1921. The division - which became effective by 20 June 1922 - still created a situation in which some rural territories that voted mostly for Poland were granted to Germany and some urban territories with a German majority were granted to Poland. The Polish Sejm decided that the eastern-most Upper Silesian areas should become an autonomous area within Poland organised as the Silesian Voivodeship and with Silesian Parliament as a constituency and Silesian Voivodeship Council as the executive body. The part of Silesia awarded to Poland was by far the best-developed and richest region of the newly formed state, producing most of Poland's industrial output. Consequently, to the division in 1922, the German-Polish Accord on East Silesia (Geneva Convention) was concluded on 15 May 1922 which dealt with the constitutional and legal future of Upper Silesia as it has partly became Polish territory.

Ex Output:
a