Input: Read this: In the United States, two of the wealthiest nonprofit organizations are the Bill and Melinda Gates Foundation, which has an endowment of US$38 billion, and the Howard Hughes Medical Institute originally funded by Hughes Aircraft prior to divestiture, which has an endowment of approximately $14.8 billion. Outside the United States, another large NPO is the British Wellcome Trust, which is a "charity" by British usage. See: List of wealthiest foundations. Note that this assessment excludes universities, at least a few of which have assets in the tens of billions of dollars. For example; List of U.S. colleges and universities by endowment.
Question: What is one of the wealthiest nonprofit organizations in America?

Output: Bill and Melinda Gates Foundation


Input: Read this: People with long-term pain frequently display psychological disturbance, with elevated scores on the Minnesota Multiphasic Personality Inventory scales of hysteria, depression and hypochondriasis (the "neurotic triad"). Some investigators have argued that it is this neuroticism that causes acute pain to turn chronic, but clinical evidence points the other way, to chronic pain causing neuroticism. When long-term pain is relieved by therapeutic intervention, scores on the neurotic triad and anxiety fall, often to normal levels. Self-esteem, often low in chronic pain patients, also shows improvement once pain has resolved.
Question: What do people with long-term psychological disturbance display?

Output: unanswerable


Input: Read this: In a WRIM, the rotor winding is made of many turns of insulated wire and is connected to slip rings on the motor shaft. An external resistor or other control devices can be connected in the rotor circuit. Resistors allow control of the motor speed, although significant power is dissipated in the external resistance. A converter can be fed from the rotor circuit and return the slip-frequency power that would otherwise be wasted back into the power system through an inverter or separate motor-generator.
Question: What can a resistor control?

Output: motor speed


Input: Read this: Inns are buildings where travellers can seek lodging and, usually, food and drink. They are typically located in the country or along a highway. In Europe, they possibly first sprang up when the Romans built a system of roads two millennia ago.[citation needed] Some inns in Europe are several centuries old. In addition to providing for the needs of travellers, inns traditionally acted as community gathering places.
Question: How many thousand years ago did the Romans build their road system?

Output:
two