Input: Planck constant
The "photoelectrons" emitted as a result of the photoelectric effect have a certain kinetic energy, which can be measured. This kinetic energy (for each photoelectron) is independent of the intensity of the light, but depends linearly on the frequency; and if the frequency is too low (corresponding to a photon energy that is less than the work function of the material), no photoelectrons are emitted at all, unless a plurality of photons, whose energetic sum is greater than the energy of the photoelectrons, acts virtually simultaneously (multiphoton effect) Assuming the frequency is high enough to cause the photoelectric effect, a rise in intensity of the light source causes more photoelectrons to be emitted with the same kinetic energy, rather than the same number of photoelectrons to be emitted with higher kinetic energy.

What factor of the initial light source does the energy of the photoelectrons depend on?
Output: frequency

Input: Santa Monica, California
As of the census of 2000, there are 84,084 people, 44,497 households, and 16,775 families in the city. The population density is 10,178.7 inhabitants per square mile (3,930.4/km). There are 47,863 housing units at an average density of 5,794.0 per square mile (2,237.3/km). The racial makeup of the city is 78.29% White, 7.25% Asian, 3.78% African American, 0.47% Native American, 0.10% Pacific Islander, 5.97% from other races, and 4.13% from two or more races. 13.44% of the population are Hispanic or Latino of any race. There are 44,497 households, out of which 15.8% have children under the age of 18, 27.5% are married couples living together, 7.5% have a female householder with no husband present, and 62.3% are non-families. 51.2% of all households are made up of individuals and 10.6% have someone living alone who is 65 years of age or older. The average household size is 1.83 and the average family size is 2.80.

What percent in the 2000 census had persons under the age of 18?
Output: 15.8%

Input: Egypt
The last ruler from the Ptolemaic line was Cleopatra VII, who committed suicide following the burial of her lover Mark Antony who had died in her arms (from a self-inflicted stab wound), after Octavian had captured Alexandria and her mercenary forces had fled. The Ptolemies faced rebellions of native Egyptians often caused by an unwanted regime and were involved in foreign and civil wars that led to the decline of the kingdom and its annexation by Rome. Nevertheless, Hellenistic culture continued to thrive in Egypt well after the Muslim conquest.

Who was last ruler of Ptolemaic Kingdom?
Output: Cleopatra VII

Input: European Central Bank
In contrast to the Fed, the ECB normally does not buy bonds outright. The normal procedure used by the ECB for manipulating the money supply has been via the so-called refinancing facilities. In these facilities, bonds are not purchased but used in reverse transactions: repurchase agreements, or collateralised loans. These two transactions are similar, i.e. bonds are used as collaterals for loans, the difference being of legal nature. In the repos the ownership of the collateral changes to the ECB until the loan is repaid.

Since the ECB doesn't buy bonds outright, how are they used?
Output:
refinancing facilities