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.

Ex Input:
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?

Ex Output:
antiparallel


Ex Input:
Context: The tradition of birthday parties started in Europe a long time ago. It was feared that evil spirits were particularly attracted to people on their birthdays. To protect them from harm, friends and family members would come to stay with the birthday person and bring good thoughts and wishes. Giving gifts brought even more good cheer to keep away from the evil spirits. This is how birthday parties began. The following are some countries' birthday traditions: Canada---Putting butter on the nose. In Atlantic Canada, the birthday child's nose is put butter on for good luck. China---Noodles for lunch. The birthday child pays respect to his / her parents and receives a gift of money. Friends and relatives are invited to lunch and noodles are served to wish the birthday child a long life. England---Money cakes. Certain symbolic objects are mixed into the birthday cake as it is being prepared. If your piece of cake has a coin in it, you will be rich. Ireland---Birthday bump . The birthday child is lifted upside down and " bumped" on the floor for good luck. Italy---Pulling ears. The child's ears are pulled as many times as how old he / she is turning. Japan---New clothes. The birthday child wears new clothes to mark the occasion. New Zealand---Birthday claps. After the candles are hit, the happy birthday song is sung loudly and often out of tune and then the birthday person receives a clap for each year he / she has been alive and then one for good luck. The United States---Cake, candles and the birthday song. A cake is made, and candles are put on top based on how old the person is. 
 Question: According to the passage, in which country can the birthday children probably receive a gift of money?

Ex Output:
china.


Ex Input:
Context: Successful people have developed habits leading to success. Those are the people you want to study and follow. Do what they do. Read what they read. If they are local, see if you can take them to lunch and ask questions. If not, get a hold of some of the things they have written about or listen to them. Most successful people enjoy the opportunity to coach people along and to help them become successful. It is their way of giving back. The trouble is that most people won't ask. They come up with excuses. They say to themselves, " I am not important enough for this person to talk to me." The successful people understand that life is a learning experience and it doesn't stop in school. They always strive( ,) to reach the next level. Life will always give you the results of your actions. Ask yourself what actions are you taking? What are you creating? You create what you think about. Willie Hooks calls it our h. a. b. e.'s. Our habits, attitudes, beliefs and expectations. Before starting any new habit we have to know what we want. So how do we permanently change our habits? Start your action plan. Put your plan together. What do I need to do first? Set my goals. Then next I would put a diet plan together. Then I would start an exercise program. You get the idea. Put a good solid plan together. So there it is in a nutshell. We have the power to change any bad habit that we don't like. Will it be easy? Probably not, but it might not be as hard as we think either. The hard part is to get started. Remember that these habit have been a part of us for a long time so don't expect miracles at first. Use the process described above and you cam overcome and change any habit that you want to change. 
 Question: What does h. a. b. e's stand for?

Ex Output:

habits, attitudes, beliefs and expectations.