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.
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Question: Passage: The Bell Telephone Company was created in 1877, and by 1886, more than 150,000 people in the U.S. owned telephones. Bell Company engineers made numerous other improvements to the telephone, which emerged as one of the most successful products ever. In 1879, the Bell company acquired Edison's patents for the carbon microphone from Western Union. This made the telephone practical for longer distances, and it was no longer necessary to shout to be heard at the receiving telephone. Question: What addition let people stop yelling into the telephone?

Answer: carbon microphone


Question: Passage: The most common cause is an infection of the intestines due to either a virus, bacteria, or parasite; a condition known as gastroenteritis. These infections are often acquired from food or water that has been contaminated by stool, or directly from another person who is infected. It may be divided into three types: short duration watery diarrhea, short duration bloody diarrhea, and if it lasts for more than two weeks, persistent diarrhea. The short duration watery diarrhea may be due to an infection by cholera, although this is rare in the developed world. If blood is present it is also known as dysentery. A number of non-infectious causes may also result in diarrhea, including hyperthyroidism, lactose intolerance, inflammatory bowel disease, a number of medications, and irritable bowel syndrome. In most cases, stool cultures are not required to confirm the exact cause. Question: What can cause an infection in the intestines?

Answer: a virus, bacteria, or parasite


Question: Passage: In February 1925, the Cardinal Secretary of State Pietro Gasparri summoned him to the Vatican and informed him of Pope Pius XI's decision to appoint him as the Apostolic Visitor to Bulgaria (1925–35). On 3 March, Pius XI also named him for consecration as titular archbishop of Areopolis, Jordan. Roncalli was initially reluctant about a mission to Bulgaria, but he would soon relent. His nomination as apostolic visitor was made official on 19 March. Roncalli was consecrated by Giovanni Tacci Porcelli in the church of San Carlo alla Corso in Rome. After he was consecrated, he introduced his family to Pope Pius XI. He chose as his episcopal motto Obedientia et Pax ("Obedience and Peace"), which became his guiding motto. While he was in Bulgaria, an earthquake struck in a town not too far from where he was. Unaffected, he wrote to his sisters Ancilla and Maria and told them both that he was fine. Question: When did Pietro Gasparri summon him to the Vatican?

Answer:
February 1925