instruction:
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.
question:
Question: Who was the last leader of the the country that was established after the year-long siege in 831? Passage:At the time of his accession, Theophilos was obliged to wage wars against the Arabs on two fronts. Sicily was once again invaded by the Arabs, who took Palermo after a year-long siege in 831, established the Emirate of Sicily, and gradually continued to expand across the island. The defence after the invasion of Anatolia by the Abbasid Caliph Al-Ma'mun in 830 was led by the Emperor himself, but the Byzantines were defeated and lost several fortresses. In 831 Theophilos retaliated by leading a large army into Cilicia and capturing Tarsus. The Emperor returned to Constantinople in triumph, but in the autumn he was defeated in Cappadocia. Another defeat in the same province in 833 forced Theophilos to sue for peace (Theophilos offered 100,000 gold dinars and the return of 7,000 prisoners), which he obtained the next year, after the death of Al-Ma'mun.

answer:
b

question:
Question: Does the Southeastern Freight Lines still operate out of Lexington, South Carolina? Passage:Southeastern Freight Lines was founded in 1950 by William T. Cassels in Lexington, South Carolina. The company first had 14 trucks and 20 employees with a $5,000 loan. In 1975 W. T. "Bill" Cassels, Jr. became President of Southeastern Freight. The Florence facility was opened in September 1953 where Bill Cassels, Jr. operated one of three trucks. On October 2, 1987 W. T. Cassels died leaving his son Cassels, Jr. as CEO of Southeastern Freight. "Tobin" Cassels III, who worked at Southeastern Freight since 1973, became President in 2001. The Augusta was established in March 1976. The expansion into the Southwest began in the 1990s with the establishment of a facility in New Orleans in 1996. Southeastern Freight expanded into the Texas market by expanding in Tyler in 2005. Eight years later Southeastern Freight further expanded in Texas with a Houston facility on February 21, 2013 and a Lubbock facility on May 11, 2015. International operations were expanded in October 2008 by offering four shipping options to Mexico. Kentucky operations of Southeastern Freight was established in 2015 with expansions to Lexington, Louisville and Bowling Green. On November 2, 2015 the West Atlanta service center opened enabling service to customers of West Georgia and East Alabama.

answer:
a

question:
Question: How many years after Ivan IV of Russia came to power did he conquer the Dorpat area? Passage:With the Treaty of Pozvol, concluded in 1557, the Livonian Confederation had turned to Poland-Lithuania for protection, triggering Ivan IV of Russia's intervention in what was to become the Livonian War. In 1558, Ivan IV had conquered the Dorpat (Tartu) area, annihilating the Bishopric of Dorpat. With the Treaty of Vilnius of 31 August 1559, Gotthard von Kettler, Grand Master of the Livonian Order, had put the order's lands under protection of Polish king and Grand Duke of Lithuania, Sigismund II Augustus. The order ceded about one seventh of its territory, allowed Sigismund to garrison its most important castles, and agreed to share with him any conquests made from Ivan IV. The alliance was intended to neutralize the imminent threat of annexation of the order's lands by Russia, yet despite earning military support from Polish-Lithuanian chancellor Mikoaj "the Black" Radziwi, Kettler was defeated in Ergeme (Ermes, 1560) and unable to prevent the occupation of most of Livonia by Russian forces. After the treaty, the disintegrating order agreed to secularization if necessary, and since Sigismund was reluctant to support it militarily, continued its search for a protector at the courts of Denmark-Norway and the Holy Roman Emperor.

answer:
b