Problem: Given the following passage "In recent years light emitting diodes (LEDs) are becoming increasingly efficient leading to an extraordinary increase in the use of solid state lighting. In many situations, controlling the light emission of LEDs may be done most effectively by using the principles of nonimaging optics.", answer the following question. Note that the answer is present within the text. Question: A device that is measured to produce an output with minimal energy loss is said to be highly what?

A: efficient

Problem: Given the question: Given the following passage "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.", answer the following question. Note that the answer is present within the text. Question: Why are LED lights hard to make?
++++++++++++++++++++++++++++++++
The answer is:
development of more efficient phosphors

input question: Given the following passage "UNFPA provided aid to Peru's reproductive health program in the mid-to-late '90s. When it was discovered a Peruvian program had been engaged in carrying out coercive sterilizations, UNFPA called for reforms and protocols to protect the rights of women seeking assistance. UNFPA was not involved in the scandal, but continued work with the country after the abuses had become public to help end the abuses and reform laws and practices.", answer the following question. Note that the answer is present within the text. Question: What are 2 people planning a wedding????
output answer: engaged

Given the following passage "With support from the British abolitionist movement, Parliament enacted the Slave Trade Act in 1807, which abolished the slave trade in the empire. In 1808, Sierra Leone was designated an official British colony for freed slaves. The Slavery Abolition Act passed in 1833 abolished slavery in the British Empire on 1 August 1834 (with the exception of St. Helena, Ceylon and the territories administered by the East India Company, though these exclusions were later repealed). Under the Act, slaves were granted full emancipation after a period of 4 to 6 years of "apprenticeship".", answer the following question. Note that the answer is present within the text. Question: What the shortest number of years slaves in the British Empire had to wait before becoming completely free after the Slavery Aboltion Act was passed?
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Answer: 4

Q: Given the following passage "The first Code of Canon Law, 1917, was mostly for the Roman Rite, with limited application to the Eastern Churches. After the Second Vatican Council, (1962 - 1965), another edition was published specifically for the Roman Rite in 1983. Most recently, 1990, the Vatican produced the Code of Canons of the Eastern Churches which became the 1st code of Eastern Catholic Canon Law.", answer the following question. Note that the answer is present within the text. Question: In what year was the Voting Rights Act of the United States signed by President Lyndon B. Johnson?
A: 1965

[Q]: Given the following passage "In quantum mechanics and quantum field theory, the vacuum is defined as the state (that is, the solution to the equations of the theory) with the lowest possible energy (the ground state of the Hilbert space). In quantum electrodynamics this vacuum is referred to as 'QED vacuum' to distinguish it from the vacuum of quantum chromodynamics, denoted as QCD vacuum. QED vacuum is a state with no matter particles (hence the name), and also no photons. As described above, this state is impossible to achieve experimentally. (Even if every matter particle could somehow be removed from a volume, it would be impossible to eliminate all the blackbody photons.) Nonetheless, it provides a good model for realizable vacuum, and agrees with a number of experimental observations as described next.", answer the following question. Note that the answer is present within the text. Question: A QED vacuum is a theoretical Hilbert space defined in what quantum mechanics theory?
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[A]:
quantum electrodynamics