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: The film starts on June 16, 1994 with Jesse meeting Celine on a train from Budapest and striking up a conversation with her. Jesse is going to Vienna to catch a flight back to the United States, whereas Celine is returning to university in Paris after visiting her grandmother. When they reach Vienna, Jesse convinces Celine to disembark with him, saying that 10 or 20 years down the road, she might not be happy with her marriage and might wonder how her life would have been different if she had picked another guy, and this is a chance to realize that he himself is not that different from the rest; in his words, he is "the same boring, unmotivated guy." Jesse has to catch a flight early in the morning and does not have enough money to rent a room for the night, so they decide to roam around in Vienna. After visiting a few landmarks in Vienna, they share a kiss at the top of the Wiener Riesenrad at sunset and start to feel a romantic connection. As they continue to roam around the city, they begin to talk more openly with each other, with conversations ranging from topics about love, life, religion, and their observations of the city. Celine tells Jesse that her last boyfriend broke up with her six months ago, claiming that she "loved him too much". When questioned, Jesse reveals he had initially come to Europe to spend time with his girlfriend who was studying in Madrid, but they had broken up when she was avoiding him while he was there. He decided to take a cheap flight home, via Vienna, but it did not leave for two weeks so he bought a Eurail pass and traveled around Europe. When they are walking alongside the Donaukanal (Danube canal) they are approached by a man who, instead of begging, offers to write them a poem with a word of their choice in it. Jesse and Celine decide on the word "milkshake", and are soon presented with the poem Delusion Angel (written for the film by the poet David Jewell). In a traditional Viennese cafe, Jesse and Celine stage fake phone conversations with each other, playing each other's friends they pretend to call. Celine reveals that she was ready to get off the train with Jesse before he convinced her. Jesse reveals that after he broke up with his girlfriend, he bought a flight that really was not much cheaper, and all he really wanted was an escape from his life. They admit their attraction to each other and how the night has made them feel, though they understand that they probably will not see each other again when they leave. They simply decide to make the best of what time they have left, ending the night with the implication of a sexual encounter between them. At that point, Jesse explains that if given the choice, he would marry her instead of never seeing her again. The film ends the next day at the train station, where, just as Celine's train is about to leave, the couple decides not to exchange any contact information but instead to meet at the same place in six months. 
 Question: Jesse and Cline decide to meet again at the train station after how many months?
answer:
six months


question:
Context: Human erythrocyte spectrin is an antiparallel heterodimer comprised of a 280 kDa alpha subunit and a 246 kDa beta subunit which further associates into tetramers in the red cell membrane cytoskeleton. Lateral association of the flexible rodlike monomers involves a multiple-step process that is initiated by a high affinity association near the actin-binding end of the molecule (dimer nucleation site). In this study, recombinant alpha and beta proteins comprising two or four "spectrin type" motifs with and without adjacent, terminal nonhomologous domains were evaluated for their relative contributions to dimer initiation, and the thermodynamic properties of these heterodimer complexes were measured. Sedimentation equilibrium studies showed that in the absence of the heterologous subunit, individual recombinant proteins formed weak homodimers (K(d) > 0.3 mM). When 2-motif (alpha20-21 and beta1-2) and 4-motif (alpha18-21 and beta1-4) recombinants lacking the terminal nonhomologous domains were paired with the complementary protein, high affinity heterodimers were formed in sedimentation equilibrium analysis. Both the alpha20-21/beta1-2 complex and the alpha20-21EF/betaABD1-2 complex showed stoichiometric binding with similar binding affinities (K(d) approximately 10 nM) using isothermal titration calorimetry. The alpha20-21/beta1-2 complex showed an enthalpy of -10 kcal/mol, while the alpha20-21EF/betaABD1-2 complex showed an enthalpy of -13 kcal/mol. Pull-down assays using alpha spectrin GST fusion proteins showed strong associations between all heterodimer complexes in physiological buffer, but all heterodimer complexes were destabilized by the presence of Triton X-100 and other detergents. Complexes lacking the nonhomologous domains were destabilized to a greater extent than complexes that included the nonhomologous domains. The detergent effect appears to be responsible for the apparent essential role of the nonhomologous domains in prior reports. Taken together, our results indicate that the terminal nonhomologous domains do not contribute to dimer initiation nor are they required for formation of high affinity spectrin heterodimers in physiological buffers. 
 Question: Alpha-spectrin and beta-spectrin subunits form parallel or antiparallel heterodimers?
answer:
antiparallel


question:
Context: English is a language spoken all around the world. There are more than 42 countries where the majority of the people speak English. Most native speakers of English are found in the United Kingdom, the United States, Canada, Australia, South Africa, Ireland and New Zealand. In total, for more than 375 million people, English is their mother tongue. An equal number of people learn English as a second language. These people will perhaps speak the language of their own country at home with their family, but the language of the government, schools, newspapers and TV is English. However, the number of people who learn English as a foreign language is more than 750 million. Everywhere in the world children go to school to learn English. In China, students learn English at school as a foreign language, except for those in hong Kong, where many people speak English as a first or a second language. In only fifty years, English has developed into the language most widely spoken and used in the world. English is the working language of most international organizations, international trade and tourism. English is also the language of global culture, such as popular music and the Internet. You can listen to English songs on the radio or use English to communicate with people around the world through the Internet. With so many people communicating in English every day, it will become more and more important to have a good knowledge of English. 
 Question: In China we are learning English as a .
answer:

foreign language