Input: Read this: The Recommended Exposure Index (REI) technique, new in the 2006 version of the standard, allows the manufacturer to specify a camera model’s EI choices arbitrarily. The choices are based solely on the manufacturer’s opinion of what EI values produce well-exposed sRGB images at the various sensor sensitivity settings. This is the only technique available under the standard for output formats that are not in the sRGB color space. This is also the only technique available under the standard when multi-zone metering (also called pattern metering) is used.
Question: What is the only technique that can be used when multi-zone metering is used?

Output: Recommended Exposure Index (REI) technique


Input: Read this: Pitch is an auditory sensation in which a listener assigns musical tones to relative positions on a musical scale based primarily on their perception of the frequency of vibration. Pitch is closely related to frequency, but the two are not equivalent. Frequency is an objective, scientific attribute that can be measured. Pitch is each person's subjective perception of a sound, which cannot be directly measured. However, this does not necessarily mean that most people won't agree on which notes are higher and lower.
Question: Each persons perception of sound is called?

Output: Pitch


Input: Read this: In a new and effective tactic, the Popular Front launched a rail blockade of Armenia, which caused petrol and food shortages because 85 percent of Armenia's freight came from Azerbaijan. Under pressure from the Popular Front the Communist authorities in Azerbaijan started making concessions. On September 25, they passed a sovereignty law that gave precedence to Azerbaijani law, and on October 4, the Popular Front was permitted to register as a legal organization as long as it lifted the blockade. Transport communications between Azerbaijan and Armenia never fully recovered. Tensions continued to escalate and on December 29, Popular Front activists seized local party offices in Jalilabad, wounding dozens.
Question: How much freight into Armenia originated in Azerbaijan? 

Output: 85 percent


Input: Read this: In the wake of the racially-motivated" church shooting in Charleston, South Carolina, Yale was under criticism again in the summer of 2015 for Calhoun College, one of 12 residential colleges, which was named after John C. Calhoun, a slave-owner and strong slavery supporter in the nineteenth century. In July 2015 students signed a petition calling for the name change. They argued in the petition that—while Calhoun was respected in the 19th century as an "extraordinary American statesman"—he was "one of the most prolific defenders of slavery and white supremacy" in the history of the United States. In August 2015 Yale President Peter Salovey addressed the Freshman Class of 2019 in which he responded to the racial tensions but explained why the college would not be renamed. He described Calhoun as a "a notable political theorist, a vice president to two different U.S. presidents, a secretary of war and of state, and a congressman and senator representing South Carolina." He acknowledged that Calhoun also "believed that the highest forms of civilization depend on involuntary servitude. Not only that, but he also believed that the races he thought to be inferior, black people in particular, ought to be subjected to it for the sake of their own best interests." Racial tensions increased in the fall of 2015 centering on comments by Nicholas A. Christakis and his wife Erika regarding freedom of speech. In April 2016 Salovey announced that "despite decades of vigorous alumni and student protests," Calhoun's name will remain on the Yale residential college explaining that it is preferable for Yale students to live in Calhoun's "shadow" so they will be "better prepared to rise to the challenges of the present and the future." He claimed that if they removed Calhoun's name, it would "obscure" his "legacy of slavery rather than addressing it." "Yale is part of that history" and "We cannot erase American history, but we can confront it, teach it and learn from it." One change that will be issued is the title of “master” for faculty members who serve as residential college leaders will be renamed to “head of college” due to its connotation of slavery.
Question: Why did people dislike the college being named after John C. Calhoun?

Output:
a slave-owner and strong slavery supporter in the nineteenth century