The task is about reading the given story and question, then finding an answer to the given question. Based on the passage provided and the given question, you should identify the shortest continuous text span from the passage that serves as an answer to the given question. Avoid answers that are incorrect or provides incomplete justification for the question.

[EX Q]: story: An incandescent light bulb, incandescent lamp or incandescent light globe is an electric light with a wire filament heated to a high temperature, by passing an electric current through it, until it glows with visible light (incandescence). The hot filament is protected from oxidation with a glass or quartz bulb that is filled with inert gas or evacuated. In a halogen lamp, filament evaporation is prevented by a chemical process that redeposits metal vapor onto the filament, extending its life. The light bulb is supplied with electric current by feed-through terminals or wires embedded in the glass. Most bulbs are used in a socket which provides mechanical support and electrical connections. 

Incandescent bulbs are much less efficient than most other types of electric lighting; incandescent bulbs convert less than 5% of the energy they use into visible light, with standard light bulbs averaging about 2.2%. The remaining energy is converted into heat. The luminous efficacy of a typical incandescent bulb is 16 lumens per watt, compared with 60 lm/W for a compact fluorescent bulb or 150 lm/W for some white LED lamps. Some applications of the incandescent bulb deliberately use the heat generated by the filament. Such applications include incubators, brooding boxes for poultry, heat lights for reptile tanks, infrared heating for industrial heating and drying processes, lava lamps, and the Easy-Bake Oven toy. Incandescent bulbs typically have short lifetimes compared with other types of lighting; around 1,000 hours for home light bulbs versus typically 10,000 hours for compact fluorescents and 30,000 hours for lighting LEDs., question: How long does an incandescent bulb last?
[EX A]: around 1,000 hours

[EX Q]: story: Once there was a group of adventurers who went on an adventure in a place named Hyperion where there was a lot of snow. Their names were Thor, Bravos, and Pierre. Thor and Bravos were from Norway, but Pierre was from Paris, France. Because of where he was from, he wasn't used to the cold. To stay warm, Pierre wore three jackets. One day during their adventure the men saw a strange cave. Thor and Bravos wanted to go inside, but Pierre was afraid. He had heard that a horrible bug monster named Vlastos lived in the caves of Hyperion. Thor and Bravos told him that was only a fairy tale. They told him the only thing he really needed to worry about was hitting his head on a rock in the cave. Finally they got Pierre to go into the cave. Inside there were lots of tunnels. They chose the middle tunnel. The tunnel went down into the earth. After a long time it ended. The men were in a huge room. There were beautiful ice shapes on the walls., question: What were their names?
[EX A]: Thor, Bravos, and Pierre

[EX Q]: story: Art lovers around the world have thought about this question for so many years: what is the secret behind the Mona Lisa's smile? However, they can ask Mona Lisa herself in the interactive exhibition in Beijing. This exhibition brings the 500-year-old painting to life. Now Leonardo da Vinci's famous painting can move her head and wave her hand in 3D, and even answer questions. She can answer the questions about her life, her age and so on. But when she talks she doesn't speak Italian but Chinese like: "Da jia hao, wo jiao Mengna Lisha. Hen gao xing jian dao ni men." The new, digital picture of Mona Lisa is the center piece of the World Classic Interactive Arts Exhibition in Beijing. You can also see other world-famous paintings such as Leonardo da Vinci's Last Supper. Last Supper is another picture that they made alive with 3D. In this picture, Jesus can walk and talk with his believers . It took the organizer Wang Hui and over 400 digital artists in South Korea two years to make the picture, at a cost of around 50 million yuan. He says, "What's special about it is that it's the first time to use computer technology to make her speak and move." So what does the Mona Lisa say if you ask her why she is smiling?, question: What else can it do?
[EX A]:
answer questions

