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: Athabasca Valles is an outflow channel on Mars, cut into its surface by catastrophic flooding. 
 Question: The astronomical body that Athabasca Valles was located on was what?
Example Output: mars

Example Input: Context: A covalent bond is the force of attraction that holds together two atoms that share a pair of electrons. The shared electrons are attracted to the nuclei of both atoms. Covalent bonds form only between atoms of nonmetals. The two atoms may be the same or different elements. If the bonds form between atoms of different elements, a covalent compound forms. Covalent compounds are described in detail later in the lesson. To see a video about covalent bonding, go to this URL: (6:20). MEDIA Click image to the left or use the URL below. URL: Figure 7.7 shows an example of a covalent bond forming between two atoms of the same element, in this case two atoms of hydrogen. The two atoms share a pair of electrons. Hydrogen normally occurs in two-atom, or diatomic, molecules like this (di- means "two"). Several other elements also normally occur as diatomic molecules: nitrogen, oxygen, and all but one of the halogens (fluorine, chlorine, bromine, and iodine). Covalent bonds form because they give atoms a more stable arrangement of electrons. Look at the hydrogen atoms in Figure 7.7. Alone, each hydrogen atom has just one electron. By sharing electrons with another hydrogen atom, it has two electrons: its own and the one in the other hydrogen atom. The shared electrons are attracted to both hydrogen nuclei. This force of attraction holds the two atoms together as a molecule of hydrogen. Some atoms need to share more than one pair of electrons to have a full outer energy level. For example, an oxygen atom has six valence electrons. It needs two more electrons to fill its outer energy level. Therefore, it must form two covalent bonds. This can happen in many different ways. One way is shown in Figure 7.8. The oxygen atom in the figure has covalent bonds with two hydrogen atoms. This forms the covalent compound water. In some covalent bonds, electrons are not shared equally between the two atoms. These are called polar bonds. Figure 7.9 shows this for water. The oxygen atom attracts the shared electrons more strongly because its nucleus has more positively charged protons. As a result, the oxygen atom becomes slightly negative in charge. The hydrogen atoms attract the electrons less strongly. They become slightly positive in charge. For another example of polar bonds, see the video at this URL: (0:52). MEDIA Click image to the left or use the URL below. URL: In other covalent bonds, electrons are shared equally. These bonds are called nonpolar bonds. Neither atom attracts the shared electrons more strongly. As a result, the atoms remain neutral. Figure 7.10 shows an example of nonpolar bonds. Covalent bonds between atoms of different elements form covalent compounds. The smallest, simplest covalent compounds have molecules with just two atoms. An example is hydrogen chloride (HCl). It consists of one hydrogen atom and one chlorine atom. The largest, most complex covalent molecules have thousands of atoms. Examples include proteins and carbohydrates. These are compounds in living things. Helpful Hints Naming Covalent Compounds Follow these rules in naming simple covalent compounds: The element closer to the left of the periodic table is named first. The second element gets the suffix ide. Prefixes such as di- (2) and tri- (3) show the number of each atom in the compound. These are written with subscripts in the chemical formula. Example: The gas that consists of one carbon atom and two oxygen atoms is named carbon dioxide. Its chemical formula is CO2 . You Try It! Problem: What is the name of the compound that contains three oxygen atoms and two nitrogen atoms? What is its chemical formula? Covalent compounds have different properties than ionic compounds because of their bonds. Covalent compounds exist as individual molecules rather than crystals. It takes less energy for individual molecules than ions in a crystal to pull apart. As a result, covalent compounds have lower melting and boiling points than ionic compounds. Many are gases or liquids at room temperature. Covalent compounds have shared electrons. These are not free to move like the transferred electrons of ionic 
 Question: any compound consisting of two or more nonmetals
Example Output: covalent compound

Example Input: Context: Hoping to increase their winning streak the Patriots flew to Cleveland Browns Stadium for an AFC duel with the Browns. The Browns took the opening kickoff 42 yards, scoring on a 38-yard field goal by Phil Dawson. Sammy Morris fumbled the ensuing kickoff and ex-Patriot Ray Ventrone recovered at the Patriots 19. Two plays later, Peyton Hillis scored on a 2-yard Peyton Hillis touchdown run. After a Patriots three-and-out, the drove to the Patriots 49, but Hillis was stripped by Mayo and Meriweather recovered at the Patriots 36. The Patriots couldn't move the ball though and punted. Early in the fourth quarter, the Patriots marched 79-yards in 11 plays, scoring on Brady's two-yard touchdown pass to Hernandez off of a deflection, trimming the deficit to 10-7. However, Cleveland countered with a 9 play, 60-yard drive, scoring on an 11-yard touchdown run by Chansi Stuckey on an end-around, extending the lead to 17-7. The Patriots drove to the Browns 9, but after catching a 6-yard pass, Gronkowski was stripped at the 3-yard line with Abram Elam recovering at the 2. The Browns took a knee and led 17-7 at halftime. Following a Patriots punt, the Browns marched 72 yards in 10 plays, scoring on a 16-yard touchdown run by Colt McCoy, increasing the Browns lead to a stunning 24-7. The Patriots reached the Browns 49 on their next drive, but a holding penalty on Gronkowski killed the drive as their offensive struggles continued. The Browns marched all the way to the Patriots 20 on their next drive, and Dawson was good on a 38-yard field goal, putting the Browns up 27-7 early in the fourth quarter. The Patriots raced 69 yards in 14 plays on their next drive, scoring when Brady found Hernandez on another 1-yard touchdown pass, trimming the deficit to a manageable 27-14. The Browns reached the 39 in five plays, then Hillis burst through and took off for a 33-yard touchdown run, giving the Browns a 34-14 lead and sealing their shocking win. Hoyer stepped in for Brady on their next drive and was intercepted by Eric Wright on the second play at the Browns 40. After the Browns punted, Hoyer took a knee to end the game. 
 Question: The Browns took how many yards on the opening kickoff?
Example Output:
42 yards