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.

Example Input: Context: Energy levels (also called electron shells) are fixed distances from the nucleus of an atom where electrons may be found. Electrons are tiny, negatively charged particles in an atom that move around the positive nucleus at the center. Energy levels are a little like the steps of a staircase. You can stand on one step or another but not in between the steps. The same goes for electrons. They can occupy one energy level or another but not the space between energy levels. The model in the Figure 1.1 shows the first four energy levels of an atom. Electrons in energy level I (also called energy level K) have the least amount of energy. As you go farther from the nucleus, electrons at higher levels have more energy, and their energy increases by a fixed, discrete amount. Electrons can jump from a lower to the next higher energy level if they absorb this amount of energy. Conversely, if electrons jump from a higher to a lower energy level, they give off energy, often in the form of light. This explains the fireworks pictured above. When the fireworks explode, electrons gain energy and jump to higher energy levels. When they jump back to their original energy levels, they release the energy as light. Different atoms have different arrangements of electrons, so they give off light of different colors. Q: In the atomic model Figure 1.1, where would you find electrons that have the most energy? A: Electrons with the most energy would be found in energy level IV. The smallest atoms are hydrogen atoms. They have just one electron orbiting the nucleus. That one electron is in the first energy level. Bigger atoms have more electrons. Electrons are always added to the lowest energy level first until it has the maximum number of electrons possible. Then electrons are added to the next higher energy level until that level is full, and so on. How many electrons can a given energy level hold? The maximum numbers of electrons possible for the first four energy levels are shown in the Figure 1.1. For example, energy level I can hold a maximum of two electrons, and energy level II can hold a maximum of eight electrons. The maximum number depends on the number of orbitals at a given energy level. An orbital is a volume of space within an atom where an electron is most likely to be found. As you can see by the images in the Figure 1.2, some orbitals are shaped like spheres (S orbitals) and some are shaped like dumbbells (P orbitals). There are other types of orbitals as well. Regardless of its shape, each orbital can hold a maximum of two electrons. Energy level I has just one orbital, so two electrons will fill this energy level. Energy level II has four orbitals, so it takes eight electrons to fill this energy level. Q: Energy level III can hold a maximum of 18 electrons. How many orbitals does this energy level have? A: At two electrons per orbital, this energy level must have nine orbitals. Electrons in the outermost energy level of an atom have a special significance. These electrons are called valence electrons, and they determine many of the properties of an atom. An atom is most stable if its outermost energy level contains as many electrons as it can hold. For example, helium has two electrons, both in the first energy level. This energy level can hold only two electrons, so heliums only energy level is full. This makes helium a very stable element. In other words, its atoms are unlikely to react with other atoms. Consider the elements fluorine and lithium, modeled in the Figure 1.3. Fluorine has seven of eight possible electrons in its outermost energy level, which is energy level II. It would be more stable if it had one more electron because this would fill its outermost energy level. Lithium, on the other hand, has just one of eight possible electrons in its outermost energy level (also energy level II). It would be more stable if it had one less electron because it would have a full outer energy level (now energy level I). Both fluorine and lithium are 
 Question: any atom is most stable when its outermost energy level contains
Example Output: as many electrons as it can hold.

Example Input: Context: The Bat has struck again, making off with a priceless necklace even after warning the police that he would rob the safe at precisely 1 a.m., after which he intends to go to country in order to give the police a rest. On his way through the village of Oakdale, the Bat notices someone robbing the Oakdale bank. Intrigued, the Bat follows the robber, who leads him to the old Fleming mansion.Inside the Fleming mansion, Cornelia van Gorder [Grayce Hamptom] and her ditzy maid Lizzie Allen [Maude Eburne] are discussing Cornelia's decision to rent the house for the summer. The big old house is a scary place, and Lizzie doesn't like the strange sounds, the strange caretaker [Spencer Charters], and the strange stories he tells about seeing ghosts in the house. Add to the fact that the Bat has taken to the country, and Lizzie is terrified of everything and anything. She's even gone so far as to set a bear trap outside her bedroom window, just in case the Bat decides to pay a vist. When Cornelia's niece Dale [Una Merkel], who works at the Oakdale Bank, returns home with her boyfriend Brook Bailey[William Bakewell] and tries to pass him off as a gardener, Cornelia is immediately suspicious (Cornelia: Any experience with alopecias? Brook: They dry up if you don't water them.), but Cornelia hires him anyway, at least until she can find out why Dale has brought him home.A rock suddenly comes crashing through the window. A note on it reads: Get out of the house now while there is still time. Immediately thereafter, Dr Venrees [Gustav von Seyffertitz] drops by to inform Cornelia that the Oakdale bank has been robbed of a half million dollars and that Fleming, Sr, the owner of the mansion, is returning from Europe so Cornelia will have to vacate the house. Then, a heavy painting moves, and a voice from behind warns them to get out of the house. Becoming concerned, Cornelia phones the police. When Detective Anderson [Chester Morris] shows up, Cornelia explains her suspicion that Fleming, Jr [Hugh Huntley] is trying to frighten her out of the house, possibly because he rented it to her while his father was out of the country. Nowthat his father is returning, she thinks he may be trying to frighten her into leaving.Soon everyone begins acting suspiciously. The doctor unlocks the broken window and "forgets" to relock it until Cornelia relocks it herself. Alone in the parlor for a few moments, Venrees unlocks the window again. Brook starts going around the house pounding on the walls. Dale phones Fleming Jr and asks him to come over. When he does, he brings a blueprint of the house so that they can locate a hidden room. Before they can find it, he is murdered, and Dale hides a piece torn from the blueprint under a tray. A storm is approaching, and the lightning knocks out the electricity. Someone phones from the garage, but when Det Anderson goes out to check, there is no one there. Detective Jones [Charles Dow Clark] arrives to help with the investigation. Dr Venrees finds the torn piece from the blueprint showing that the hidden room is behind a fireplace, but Det Anderson forces him to hand it over. When Anderson is poring over the blueprint, Venrees clobbers him with a heavy statue and locks his body in a closet. In the lightning flashes, the silhouette of the Bat can be seen peering into the window.It gets even more intriguing. Brook turns out to be a cashier from the bank and the primary suspect in the theft. Fleming Sr is seen walking on the roof when he's supposed to be out of the country. Dale finds the secret room behind a fireplace and gets locked in, along with the Bat, Mr Fleming Sr, and the money. The Bat shoots Fleming Sr. Dale escapes and leads Inspector Jones, Cornelia, and Dr Venrees to the secret room. Just as the fireplace swings open, Venrees blows out the candle, allowing whomever was in the room to escape. Finally, 
 Question: Where do Brook and Dale think the money from the robbery is hidden?
Example Output: behind the fireplace

Example Input: Context: Scores of people queued up to use a cash machine after it started giving out double the money requested. The cash machine, outside a Sainsbury's store in Barham Road, Hull, attracted a big crowd of people hoping to take advantage of the fault, on Tuesday night. Police officers were eventually sent in to guard the machine and prevent anymore money from being withdrawn. The fault is thought to have affected cash machines at supermarkets across the city. It is not yet known whether the customers will have to repay the cash or how much money was taken out. A spokeswoman for Humberside Police said, "Officers were sent to the cash machine to prevent anyone else from withdrawing anymore money. We have also tried to make contact with the owners of the machine." The spokeswoman said those who benefited from the fault could be traced and could face theft charges, but investigations would only take place if the operator made a complaint. The cash machine is owned by a company called Payzone, a spokesman later confirmed. He said the fault was due to the machine being filled with notes of the wrong denomination . An investigation is underway into the incident and the machine had been taken out of service, he added. The Payzone spokesman said, "The transit company which is contracted to service this ATM has filled it up with the wrong denomination of notes, meaning it is paying out double what it should have. " He could not say how much money had been taken out of the machine, or whether it would have to be paid back. It was understood that a number of cash machines in Hull owned by other companies had also been affected by this problem, he added. 
 Question: Who caused the cash machine not to work properly?
Example Output:
the transit company.