Problem: Given the question: Extract the answer to the question from the following context. Question: A primary feature of it is its luminous efficacy? Context: An important property of light fixtures is the luminous efficacy or wall-plug efficiency, meaning the amount of usable light emanating from the fixture per used energy, usually measured in lumen per watt. A fixture using replaceable light sources can also have its efficiency quoted as the percentage of light passed from the "bulb" to the surroundings. The more transparent the lighting fixture is, the higher efficacy. Shading the light will normally decrease efficacy but increase the directionality and the visual comfort probability.
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The answer is:
light fixtures

Problem: Given the question: Extract the answer to the question from the following context. Question: The Grounds held the festival since and until when? Context: The tradition of Estonian Song Festivals (Laulupidu) started at the height of the Estonian national awakening in 1869. Today, it is one of the largest amateur choral events in the world. In 2004, about 100,000 people participated in the Song Festival. Since 1928, the Tallinn Song Festival Grounds (Lauluvaljak) have hosted the event every five years in July. The last festival took place in July 2014. In addition, Youth Song Festivals are also held every four or five years, the last of them in 2011, and the next is scheduled for 2017.
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The answer is:
Since 1928, the Tallinn Song Festival Grounds (Lauluvaljak) have hosted the event every five years in July. The last festival took place in July 2014

Problem: Given the question: Extract the answer to the question from the following context. Question: What does the F in "CBFC" stand for? Context: In India, it was reported that the Indian Central Board of Film Certification (CBFC) censored kissing scenes featuring Monica Bellucci, Daniel Craig, and Lea Seydoux. They also muted all profanity. This prompted criticism of the board online, especially on Twitter.
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The answer is:
Film