instruction:
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.
question:
Context: Yosemite Sam runs for mayor of a small town, and in his campaign speech, he makes several empty promises like "There's enough fresh air and sunshine in this great country of ours for everybody - and I'll see to it that you'll get your share!" As the speech continues, we see that Bugs Bunny is drinking carrot juice beneath Sam's podium. When Sam pledges to make good on a previous promise "to rid this country of every last rabbit", Bugs decides that the best way to fight him is to run for mayor against him. Bugs soon tries to win the townspeople over with Theodore Roosevelt's famous quote "I speak softly, but I carry a big stick!", which leads Sam to declare "I speak LOUD and I carry a BIGGER stick, and I use it too!".Sam has several tricks up his sleeve, but Bugs finds a way to answer every one. When Sam steals Bugs' cigar stand, Bugs switches the "Smello" cigars he had been selling for five-cent "Atom" explosive cigars (the box includes the slogan "You Will Get A BANG Out of This"). Sam gives a cigar to a man, but after the cigar explodes, the man punches Sam in the face. Sam then sends a box full of "assorted" picnic ants to steal all of the food at Bugs' picnic, which leads Bugs to hide a stick of dynamite in a watermelon being stolen.Sam rigs up a cannon at the front door of Bugs' headquarters, then turns up at the back door greeting Bugs in a friendly manner. When he taps his foot on the floor, he suggests that someone is knocking at the front door, and Bugs leaves Sam and goes to answer it, but this plan backfires when Bugs tells Sam that it was someone for him, and she said to mention St. Louis, which leads Sam to think that a pretty girl named Emma is there. Sam runs to the front door, opens it and gets shot by his own cannon.Sam's next challenge is to ask Bugs if he can "play the pi-anna". Bugs accepts, so Sam rigs an explosive in a particular piano key, and presents the piano to Bugs with a sheet of music containing the tune "Those Endearing Young Charms". When Bugs plays the tune, he deliberately hits a sour note that avoids the explosive key. When Bugs gets the note wrong a second time, it infuriates Sam, who shows Bugs how to play the tune correctly, and falls for his own trap by playing the note that sets off the explosion.After this, Sam and Bugs engage in a short pursuit through the streets of the town, which ends when they come across a parade that celebrates the newly-elected mayor - a chestnut horse who rides in a car bearing a sign that says "Our New Mare" - a literal "dark horse" candidate. This leads Bugs to make the odd suggestion to Sam to play a game of Russian Roulette and hand a gun to Sam. Sam agrees to the game, points the gun to his head, closes his eyes, pulls the trigger and hears the click of an empty barrel. Sam then passes the gun to Bugs, who points it to his head, closes his eyes and pulls the trigger as the film irises out into black in the middle. We hear the sound of a gunshot, then the film irises in on the left hand side to reveal a ducking Bugs, who holds a smoking gun as he says "I missed". A second iris appears on the right hand side to show Sam, who appears scorched and is missing his hat as a result of being hit in the face by Bugs' wayward shot. After Sam says "I hate that rabbit!", both sides of the film iris out for good. 
 Question: Who was the "dark horse" candidate?
answer:
the newly-elected mayor - a chestnut horse


question:
Context: Leonard (Phoenix) is walking along a bridge over a creek in Brooklyn, when suddenly he jumps into the water in an attempted suicide. He changes his mind and quickly walks home to his parents' apartment. His mother, seeing him dripping wet, tells her husband their son has tried it again and it becomes evident that Leonard has tried to kill himself before. His parents tell him that a potential business partner and his family are invited for dinner that night and ask him to be present. When they arrive, Leonard finds that he had been set up with the other family's daughter, Sandra (Shaw). She inquires about his interest in photography and notices a photo of a girl above his headboard. He explains he had been engaged to the girl for several years, but the relationship was broken off when it turned out both he and his fiancee carried the gene for TaySachs disease, which results in diseased children who generally don't live beyond age 12, so they would be unable to have healthy children. Leonard meets a new neighbor, Michelle (Paltrow), and is immediately attracted to her, choosing to ignore that she has a drug usage problem. He learns that she is dating a married partner in her law firm, Ronald (Koteas). At her request, Leonard agrees to meet Ronald and Michelle for dinner at a restaurant. The couple leave him later that evening, as they have plans to attend the Metropolitan Opera. Leonard returns home upset, but to his surprise, Sandra arrives, sent over by Leonard's parents. She is under the impression that Leonard wanted her to come by, but realizes by his surprised look, that she was set up. She apologizes for the misunderstanding and says that if he isn't interested, a lot of other guys are. Leonard says that he likes her, and they kiss and eventually make love, and with time, his relationship with Sandra deepens. Michelle calls Leonard and says she is sick. He takes her to the hospital, where she has a D&C for a miscarriage. She had not known she was pregnant and is even more upset that Ronald didn't respond to her calls. Leonard takes her home but Ronald arrives. Leonard hides while Ronald apologizes to Michelle for not having come to her aid. Michelle coldly asks Ronald to leave. She then asks Leonard to write something on her forearm with his finger while she falls asleep. Leonard writes "I love you". Two weeks later, Michelle meets Leonard on the roof of their building and tells him that she has broken up with Ronald and is going to San Francisco. Leonard tells her not to leave and professes his love for her. They have sex and plan to leave together the next day for San Francisco. On New Year's Eve, Leonard buys an engagement ring for Michelle. He is then summoned by Sandra's father and is offered a partnership in the family businesses, with the assumption that he is going to marry Sandra. Noticing the jeweler's gift bag Leonard is holding, the father assumes it is for Sandra; Leonard lies that it is. During his parents' New Year's Eve party, Leonard ducks out to the courtyard to meet Michelle. Michelle arrives ten minutes past departure time and tells Leonard that she isn't going to San Francisco, because Ronald, having learned Michelle is leaving him for California, decided to leave his wife and children for her. Distraught, Leonard breaks things off with her for good. Feeling desolate, Leonard heads to the beach, presumably intending to kill himself. When he drops a glove that Sandra had bought for him, he realizes that, in Sandra, he has found someone who loves him and with whom he can build a decent life. He picks up the glove and sees the boxed engagement ring lying on the sand, where he had thrown it from the boardwalk earlier. He returns to the party, where he gives Sandra the ring and embraces her in a prolonged hug. 
 Question: where Leonard meets Ronald and Michelle for dinner in this movie?
answer:
a restaurant


question:
Context: Radioactive decay is the breakdown of unstable elements into stable elements. To understand this process, recall that the atoms of all elements contain the particles protons, neutrons, and electrons. An element is defined by the number of protons it contains. All atoms of a given element contain the same number of protons. The number of neutrons in an element may vary. Atoms of an element with different numbers of neutrons are called isotopes. Consider carbon as an example. Two isotopes of carbon are shown in Figure 11.15. Compare their protons and neutrons. Both contain 6 protons. But carbon-12 has 6 neutrons and carbon-14 has 8 neutrons. Almost all carbon atoms are carbon-12. This is a stable isotope of carbon. Only a tiny percentage of carbon atoms are carbon-14. Carbon-14 is unstable. Figure 11.16 shows carbon dioxide, which forms in the atmosphere from carbon-14 and oxygen. Neutrons in cosmic rays strike nitrogen atoms in the atmosphere. The nitrogen forms carbon- 14. Carbon in the atmosphere combines with oxygen to form carbon dioxide. Plants take in carbon dioxide during photosynthesis. In this way, carbon-14 enters food chains. Like other unstable isotopes, carbon-14 breaks down, or decays. For carbon-14 decay, each carbon-14 atom loses an alpha particle. It changes to a stable atom of nitrogen-14. This is illustrated in Figure 11.17. The decay of an unstable isotope to a stable element occurs at a constant rate. This rate is different for each isotope pair. The decay rate is measured in a unit called the half-life. The half-life is the time it takes for half of a given amount of an isotope to decay. For example, the half-life of carbon-14 is 5730 years. Imagine that you start out with 100 grams of carbon-14. In 5730 years, half of it decays. This leaves 50 grams of carbon-14. Over the next 5730 years, half of the remaining amount will decay. Now there are 25 grams of carbon-14. How many grams will there be in another 5730 years? Figure 11.18 graphs the rate of decay of carbon-14. The rate of decay of unstable isotopes can be used to estimate the absolute ages of fossils and rocks. This type of dating is called radiometric dating. The best-known method of radiometric dating is carbon-14 dating. A living thing takes in carbon-14 (along with stable carbon-12). As the carbon-14 decays, it is replaced with more carbon-14. After the organism dies, it stops taking in carbon. That includes carbon-14. The carbon-14 that is in its body continues to decay. So the organism contains less and less carbon-14 as time goes on. We can estimate the amount of carbon-14 that has decayed by measuring the amount of carbon-14 to carbon-12. We know how fast carbon-14 decays. With this information, we can tell how long ago the organism died. Carbon-14 has a relatively short half-life. It decays quickly compared to some other unstable isotopes. So carbon- 14 dating is useful for specimens younger than 50,000 years old. Thats a blink of an eye in geologic time. But radiocarbon dating is very useful for more recent events. One important use of radiocarbon is early human sites. Carbon-14 dating is also limited to the remains of once-living things. To date rocks, scientists use other radioactive isotopes. The isotopes in Table 11.1 are used to date igneous rocks. These isotopes have much longer half-lives than carbon- 14. Because they decay more slowly, they can be used to date much older specimens. Which of these isotopes could be used to date a rock that formed half a million years ago? Unstable Isotope Decays to At a Half-Life of (years) Potassium-40 Uranium-235 Uranium-238 Argon-40 Lead-207 Lead-206 1.3 billion 700 million 4.5 billion Dates Rocks Aged (years old) 100 thousand - 1 billion 1 million - 4.5 billion 1 million - 4.5 billion 
 Question: New atoms of carbon-14 form in the atmosphere because of
answer:

cosmic rays.