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: This article's plot summary may be too long or excessively detailed. Please help improve it by removing unnecessary details and making it more concise. (April 2015) (Learn how and when to remove this template message) Part 1 Alice in Wonderland[edit] The first part opens with Alice helping Mother set the table for tea time. Although thankful for her daughter's help, Mother tells Alice that she is still not grown-up enough to join the adults at tea. Alice goes outside to see her sister (played by Natalie's real-life older sister Sharee Gregory), but gets bored of reading a book with no pictures. Her sister tells her that she will understand when she grows up, but Alice thinks she is already grown up (after all, she's seven and a half). While playing with her kitten, Dinah, the White Rabbit comes running by, saying he's late. Wondering where he is going, Alice follows him and tumbles into his rabbit hole. (Unlike the book and most movie versions, this rabbit hole appears to be dark and spooky.) Alice finds herself in a hall with many doors, and all of them locked. On a table is a key which she can use to open one small door. Yet the door is far too small to even fit her head in. A small bottle appears labeled "Drink Me". She comes back to the table and puts it to her lips. Doing this, she shrinks to the right size for the door, but can no longer reach the key to open it. She then sees a small box which she opens and finds a little cake with the words "Eat Me" on it. She then grows to over nine feet tall. Frustrated with the thought of being stuck at nine feet tall, she begins to cry. Her tears fall on the floor and flow under the cracks. The White Rabbit appears, but frightened of the giant Alice runs away dropping his fan and gloves. Using the fan makes Alice shrink again to a size small enough to crawl into one of the cracks, which takes her diving in her pool of tears. While swimming in the pool of her own tears, she meets The Lory Bird, The Dodo Bird and the Mouse, who tells her why he hates dogs and cats ("I Hate Dogs and Cats"). Alice catches up with the White Rabbit. He mistakes Alice for his housemaid Mary Ann and orders her to go get his fan and gloves from his house. While searching his house, Alice curiously finds another "Drink Me" bottle and it makes her sprout to her full nine-foot character once again. Angry at Alice, the rabbit and his friend Pat the Pig try to employ Bill the Lizard to remove Alice by pulling her out the chimney. Having tried unsuccessfully the White Rabbit and Pat begin throwing berries at her which turn into little cakes. She eats one and shrinks to back to size. After running away she meets the Caterpillar who tells her the story ("You are Old, Father William"). She then goes to the house of The Duchess and her pepper loving, plate throwing cook. Finding the house too violent and hateful, she takes the Duchess' baby away, but then it turns into a pig. She meets the Cheshire Cat, who tells her that she can't get out of this land ("There's No Way Home"). He then gives her directions to see either the March Hare or the Mad Hatter, but warns Alice that they, along with everyone else, are mad. Alice finds the Mad Hatter, March Hare, and the Dormouse having an outdoor tea party, and sits down to join them. As tea time entertainment the Mad Hatter, who does not like her version of twinkle, twinkle little star, sings Alice a song of his own ("Laugh"). Upset by the rudeness of the Mad Tea Party, Alice runs off back on her quest for the White Rabbit, and meets a baby fawn in the forest, the only normal thing she's seen so
Question: Who plays a prank on the queen?
the deck of cards

Context: Fergus Crane is a children's book written by Paul Stewart and illustrated by Chris Riddell, published in 2004.
Question: Who was Fergus Crane illustrated by?
chris riddell