In this task, you are given a question and a context passage. You have to answer the question based on the given passage.

Input: Consider Input: Which of the following did not occur in the 20th century: urbanization, the spread of the Ottoman Empire, or wars?, Context: South Slavic historically formed a dialect continuum, i.e. each dialect has some similarities with the neighboring one, and differences grow with distance. However, migrations from the 16th to 18th centuries resulting from the spread of Ottoman Empire on the Balkans have caused large-scale population displacement that broke the dialect continuum into many geographical pockets. Migrations in the 20th century, primarily caused by urbanization and wars, also contributed to the reduction of dialectal differences.

Output: spread of Ottoman Empire


Input: Consider Input: If you need to know how to do a certain skill where will you likely learn how?, Context: Canada's Armed forces operate out of 27 Canadian Forces bases (CFB) across the country, including NDHQ. This number has been gradually reduced since the 1970s with bases either being closed or merged. Both officers and non-commissioned members receive their basic training at the Canadian Forces Leadership and Recruit School in Saint-Jean-sur-Richelieu. Officers will generally either directly enter the Canadian Armed Forces with a degree from a civilian university, or receive their commission upon graduation from the Royal Military College of Canada. Specific element and trade training is conducted at a variety of institutions throughout Canada, and to a lesser extent, the world.

Output: at a variety of institutions throughout Canada


Input: Consider Input: What level of efficiency are current LED phosphors at?, Context: Among the challenges being faced to improve the efficiency of LED-based white light sources is the development of more efficient phosphors. As of 2010, the most efficient yellow phosphor is still the YAG phosphor, with less than 10% Stoke shift loss. Losses attributable to internal optical losses due to re-absorption in the LED chip and in the LED packaging itself account typically for another 10% to 30% of efficiency loss. Currently, in the area of phosphor LED development, much effort is being spent on optimizing these devices to higher light output and higher operation temperatures. For instance, the efficiency can be raised by adapting better package design or by using a more suitable type of phosphor. Conformal coating process is frequently used to address the issue of varying phosphor thickness.
Output: 10% Stoke shift loss