instruction:
This task involves creating questions from a given passage that involve some kind of complex reasoning (including numerical reasoning). 
The generated questions must require looking at more than one part of the passage to answer. Try to use a variety of reasoning types in your questions (some of the sample reasoning types are illustrated in the 'positive examples' field) and also have a variety of answer types (spans, numbers, dates). A span is a continuous phrase taken directly from the passage or question. In such questions, the answer spans are recommended to be five words. Questions with answer type "number", are expected to start with "How many". For instance, "How long did an event last?" can be phrased as "How many years did an event last?". To increase diversity, try to create more questions for which the answer will be multiple spans. Please create questions that require AT LEAST 2 arithmetic operations as illustrated in the 'positive examples' field. You are encouraged to try DIFFERENT COMBINATIONS of operations and not just limit to the combinations shown in those examples. The more challenging questions you create, the better it is.
question:
Passage: The most extensive county or county-equivalent is the Yukon-Koyukuk Census Area, Alaska, with a land area of 145,505 square miles (376,856 km2). All nine of the most extensive county-equivalents are in Alaska. The most extensive county is San Bernardino County, California, with a land area of 20,057 square miles (51,947 km2). The least extensive county is Kalawao County, Hawaii, with a land area of 11.991 square miles (31.058 km2). The least extensive county-equivalent in the 50 states is the independent city (United States) Falls Church, Virginia, with a land area of 1.999 square miles (5.177 km2). If U.S. territories are included, the least extensive county-equivalent is Kingman Reef, with a land area of 0.01 square miles (0.03 km2).
answer:
How many more square miles is San Bernardino County than Kalawao County?


question:
Passage: On November 2, Plymouth Colony governor Josiah Winslow led a combined force of colonial militia against the Narragansett tribe. The Narragansetts had not been directly involved in the war, but they had sheltered many of the Wampanoag fighters, women, and children. Some of their warriors had participated in several Indian attacks. The colonists distrusted the tribe and did not understand the various alliances. As the colonial forces went through Rhode Island, they found and burned several Indian towns which had been abandoned by the Narragansetts, who had retreated to a massive fort in a frozen swamp. The cold weather in December froze the swamp so that it was relatively easy to traverse. The colonial force found the Narragansett fort on December 19, 1675 near present-day South Kingstown, Rhode Island; they attacked in a combined force of Plymouth, Massachusetts, and Connecticut militia numbering about 1,000 men, including about 150 Pequots and Mohican Indian allies. The fierce battle that followed is known as the Great Swamp Fight. It is believed that the militia killed about 600 Narragansetts. They burned the fort  of land) and destroyed most of the tribe's winter stores. Most of the Narragansett warriors  escaped into the frozen swamp. The colonists lost many of their officers in this assault; about 70 of their men were killed and nearly 150 more wounded.  The rest of the colonial assembled forces returned to their homes, lacking supplies for an extended campaign. The nearby towns in Rhode Island provided care for the wounded until they could return to their homes.
answer:
How many different militias did the force comprise of?


question:
Passage: Aleksandr Vasilievich Nazarenko  is a Russian historian who works in the Moscow State University. He heads the project "Russia and Central Europe in the Middle Ages" in the World History Institute of the Russian Academy of Sciences. Having studied at the university to gain doctorates in philology and history, Nazarenko revived the tenet of 19th-century Russian historiography that it is impossible to research early East Slavic history without detailed knowledge of ancient languages. Considered a disciple of Vladimir Pashuto, Nazarenko advocates tighter integration of historiography with the auxiliary disciplines of genealogy, numismatics, and sigillography. This approach allowed him to identify and publish a number of new  sources on the history of Kievan Rus. Nazarenko's major findings were summarized in a monograph International Relations of Ancient Rus . Moskva: Russkiĭ fond sodeĭstviii︠a︡ obrazovanii︠u︡ i nauke, 2009 ISBN 5-91244-009-5 Upon its publication in 2009, the book won Nazarenko the Macarius Award of the Russian Orthodox Church.
answer:

From where did Aleksandr Vasilievich Nazarenko receive his doctorates?