This task is about writing a correct answer for the reading comprehension task. Based on the information provided in a given passage, you should identify the shortest continuous text span from the passage that serves as an answer to the given question. Avoid answers that are incorrect or provides incomplete justification for the question.

Example Input: Passage: Some Christian writers considered the possibility that pagan commentators may have mentioned this event, mistaking it for a solar eclipse - although this would have been impossible during the Passover, which takes place at the full moon. Christian traveller and historian Sextus Julius Africanus and Christian theologian Origen refer to Greek historian Phlegon, who lived in the 2nd century AD, as having written "with regard to the eclipse in the time of Tiberius Caesar, in whose reign Jesus appears to have been crucified, and the great earthquakes which then took place" Question: As what was the event mistaken by some pagans?
Example Output: a solar eclipse

Example Input: Passage: Israel retaliated against Egyptian shelling with commando raids, artillery shelling and air strikes. This resulted in an exodus of civilians from Egyptian cities along the Suez Canal's western bank. Nasser ceased all military activities and began a program to build a network of internal defenses, while receiving the financial backing of various Arab states. The war resumed in March 1969. In November, Nasser brokered an agreement between the PLO and the Lebanese military that granted Palestinian guerrillas the right to use Lebanese territory to attack Israel. Question: Who would get to attack Israel from Lebanon?
Example Output: Palestinian guerrillas

Example Input: Passage: In the late 19th century, three European-American middle-class female teachers married Indigenous American men they had met at Hampton Institute during the years when it ran its Indian program. In the late nineteenth century, Charles Eastman, a physician of European and Sioux ancestry who trained at Boston University, married Elaine Goodale, a European-American woman from New England. They met and worked together in Dakota Territory when she was Superintendent of Indian Education and he was a doctor for the reservations. His maternal grandfather was Seth Eastman, an artist and Army officer from New England, who had married a Sioux woman and had a daughter with her while stationed at Fort Snelling in Minnesota. Question: What tribe was Eastman related to?
Example Output:
Sioux