Question: Most CBC television stations, including those in the major cities, are owned and operated by the CBC itself. CBC O&O stations operate as a mostly seamless national service with few deviations from the main network schedule, although there are some regional differences from time to time. For on-air identification, most CBC stations use the CBC brand rather than their call letters, not identifying themselves specifically until sign-on or sign-off (though some, like Toronto's CBLT, do not ID themselves at all except through PSIP). All CBC O&O stations have a standard call letter naming convention, in that the first two letters are "CB" (an ITU prefix allocated not to Canada, but to Chile) and the last letter is "T". Only the third letter varies from market to market; however, that letter is typically the same as the third letter of the CBC Radio One and CBC Radio 2 stations in the same market. An exception to this rule are the CBC North stations in Yellowknife, Whitehorse and Iqaluit, whose call signs begin with "CF" due to their historic association with the CBC's Frontier Coverage Package prior to the advent of microwave and satellite broadcasting.
Is there an answer to this question: In order to join the CBC broadcasting network, owners and operators change their call letters to conform to this rule?

Answer: unanswerable


Question: A bantam is a small variety of domestic chicken, either a miniature version of a member of a standard breed, or a "true bantam" with no larger counterpart. The name derives from the town of Bantam in Java where European sailors bought the local small chickens for their shipboard supplies. Bantams may be a quarter to a third of the size of standard birds and lay similarly small eggs. They are kept by small-holders and hobbyists for egg production, use as broody hens, ornamental purposes, and showing.
Is there an answer to this question: What sailors disliked small chickens?

Answer: unanswerable


Question: In response to the demands, in 1987 the Federal District received a greater degree of autonomy, with the elaboration the first Statute of Government (Estatuto de Gobierno), and the creation of an Assembly of Representatives.[citation needed] In the 1990s, this autonomy was further expanded and, starting from 1997, residents can directly elect the head of government of the Federal District and the representatives of a unicameral Legislative Assembly (which succeeded the previous Assembly) by popular vote.
Is there an answer to this question: What gave the Federal District more autonomy? 

Answer: first Statute of Government


Question: The Sustainable Development Goals are ambitious, and they will require enormous efforts across countries, continents, industries and disciplines - but they are achievable. UNFPA is working with governments, partners and other UN agencies to directly tackle many of these goals - in particular Goal 3 on health, Goal 4 on education and Goal 5 on gender equality - and contributes in a variety of ways to achieving many of the rest. 
Is there an answer to this question: Are the Sustainable Development Goals considered ambitious or modest in scope?

Answer:
ambitious