Based on the information present in the given passage, you need to write a correct answer to the given question. A correct answer is one that correctly and completely answers the question. Do not write answers that address the question partially or incorrectly. The correct answer must be contained in the given paragraph.
One example: Paragraph- Sent 1: Obama was born on August 4, 1961, at Kapiʻolani Maternity & Gynecological Hospital in Honolulu, Hawaii.
Sent 2: He is the only President to have been born in Hawaii.
Sent 3: He was born to a white mother and a black father.
Sent 4: His mother, Ann Dunham (1942-1995), was born in Wichita, Kansas, of mostly English descent, with some German, Irish, Scottish, Swiss, and Welsh ancestry. Question: How old was Obama's mother when he was born?
Solution is here: 19.
Explanation: Obama was born in 1961. His mother was born in 1942 and 1961-1942=19. Therefore, any of the following responses are considred correct: '19' and 'almost twenty'.

Now, solve this: Paragraph- Sent 1: Cavour was a younger son of a noble Piedmontese family, and entered the army in 1826, serving in the engineers.
Sent 2: His liberal sentiments made him distrusted by the government of Charles Felix as a dangerous man, and he was doomed to an inactive life in an unimportant post.
Sent 3: He soon quitted the army, and embarked in business operations as manager of one of the estates of his family.
Sent 4: For twelve years he confined himself to agricultural labors, making himself acquainted with all the details of business and with the science of agriculture, introducing such improvements as the use of guano, and promoting agricultural associations; but he was not indifferent at the same time to public affairs, being one of the most zealous advocates of constitutional liberty.
Sent 5: A residence in England gave him much valuable knowledge as to the working of representative institutions.
Sent 6: He established in 1847 a political newspaper, and went into parliament as a member of the Chamber of Deputies.
Sent 7: In 1848 he used all his influence to induce the government to make war with Austria; and when Charles Albert abdicated, and Victor Emmanuel became king, Cavour's great talents were rewarded.
Sent 8: In 1850 he became minister of commerce; in 1852, prime minister.
Sent 9: After that, his history is the history of Italy itself. 
Question: Cavour worked in agriculture after doing what for his family?.
Solution:
He became the manager of one of his family's estates.