Given a question and a context passage, generate the answer having the word or phrase from the context passage. Here, the answer should be a shortest continous span from the passage.

Context: An electric transformer is a device that uses electromagnetic induction to change the voltage of electric current. Electromagnetic induction is the process of generating current with a magnetic field. It occurs when a magnetic field and electric conductor, such as a coil of wire, move relative to one another. A transformer may either increase or decrease voltage. You can see the basic components of an electric transformer in the Figure 1.1. Click image to the left or use the URL below. URL: The transformer in the diagram consists of two wire coils wrapped around an iron core. Each coil is part of a different circuit. When alternating current passes through coil P, it magnetizes the iron core. Because the current is alternating, the magnetic field of the iron core keeps reversing. This is where electromagnetic induction comes in. The changing magnetic field induces alternating current in coil S of the other circuit. Notice that coil P and coil S in the Figure 1.1 have the same number of turns of wire. In this case, the voltages of the primary and secondary currents are the same. Usually, the two coils of a transformer have different numbers of turns. In that case, the voltages of the two currents are different. When coil S has more turns than coil P, the voltage in the secondary current is greater than the voltage in the primary current (see Figure 1.2). This type of transformer is called a step-up transformer. Thats because it steps up, or increases, the voltage. When coil S has fewer turns of wire than coil P, the voltage in the secondary current is less than the voltage in the primary current (see Figure 1.3). This type of transformer is called a step-down transformer because it steps down, or decreases, the voltage. Q: Both step-up and step-down transformers are used in the electrical grid that carries electricity from a power plant to your home. Where in the grid do you think step-down transformers might be used? A: One place that step-down transformers are used is on the electric poles that supply current to homes. They reduce the voltage of the electric current before it enters home circuits.
Question: an electric transformer contains
an iron core.

Context: Even while in a deep sleep, people can still learn brand new information. Sleepers soak in new associations between smells and sounds, knowledge that lingers into the next waking day, researchers report online August 26 in Nature Neuroscience. The new study is the first to show that entirely new information can get into the sleeping mind, says Anat Arzi of the Weizmann Institute of Science in Israel. "The brain is not passive while you sleep. It's quite active. You can do quite a lot of things while you are asleep." But the results don't mean that Spanish vocabulary tapes now have a place on the nightstand. L, Researchers have tried but largely failed to find evidence that complicated information, such as new pairs of words, can make its way into the brain during sleep. Instead of trying to teach people something complicated like a new language, Arzi and her colleagues relied on the sense of smell and hearing. As anyone who has walked by a dumpster in July knows, smells can cause a nose-jerk reaction. Catching a bad smell automatically makes people inhale less, reducing the size of the inhale. But scent of fresh bread causes a long, deep inhale., rzi and her team took advantage of this reaction for their experiment. As people slept in the laboratory, the researchers delivered pleasant scent, such as shampoo. As this nice smell got into the sleepers' noses, the researchers played a particular music. Later, a disgusting smell, such as rotten fish or meat, was paired with a different music. Neither the smell nor the sound woke people up. After just four exposures to the smell-music pair during a single night, the sleepers started to automatically respond to the tones without the accompanying smells, taking in bigger breaths when the shampoo-associated tone played and smaller breaths when played the sound linked to the rotten fish smell. This new learned association lingered into the next waking day, too. Even though the sleepers had no idea they had been exposed to smells or sounds, their behavior proved that their brain had actually learned something during sleep. As before, the shampoo sound stimulated a long, deep inhale, while the rotten fish tone caused more shallow breaths.
Question: In which part of a website may this passage most likely appear?
science.

Context: A dash of style with loads of attitude and a hunger to reach the stars, Lafangey Parindey is about a group of youngsters living in the backstreets of Mumbai. It is an unusual love story of Nandu (Neil Nitin Mukesh) and Pinky (Deepika Padukone) whose path to love is paved by friendship, grit and hope.He is wild. He is born to fight. He is One-Shot Nandu. For the raw, champion street fighter, one-shot is literally what it takes. Absolutely wild, fierce, and hungry to win, this fighter takes boxing to a new level by knocking down his opponents BLINDFOLDED. Needless to say, One-Shot lives life on his own terms and is a local hero amongst his friends. But all that soon changes, when he meets Pinky Palkar.She is blind. She is born to fly. She is Pinky Palkar. A unique girl, a powerhouse of talent! On one hand she works at a regular, boring 9-to-5 job at a mall but on the other hand, she is a kickass dancer on skates! Strong headed, talented and fiercely ambitious these traits make up Pinky Palkar's deadly personality. Her life's ambition is only one to rise above all the 'losers' living in her locality and carve a niche for herself. She will use her talent to show the others that she can win in life. There is only one, tiny, obstacle She is blind.Lafangey Parindey. Two different personalities. Two different lives. Destined to meet.Set in the grungy streets of Mumbai, Lafangey Parindey is an unusual, edgy love story about the never say die spirit even when your last chip is down. It is an intriguing journey of a blindfolded street fighter and a blind dancer who, along with four friends, set out to achieve the impossible.Born wild, will one-shot Nandu ever learn to love? Born to fly, will Pinky Palkar ever learn to see?
Question: From which city does Pinky come from?
mumbai