Input: New Haven, Connecticut
The New Haven Division buses follow routes that had originally been covered by trolley service. Horse-drawn steetcars began operating in New Haven in the 1860s, and by the mid-1890s all the lines had become electric. In the 1920s and 1930s, some of the trolley lines began to be replaced by bus lines, with the last trolley route converted to bus in 1948. The City of New Haven is in the very early stages of considering the restoration of streetcar (light-rail) service, which has been absent since the postwar period.

What mode of public transportation in New Haven phased out the trolley service in the 1920's and 1930's?
Output: bus lines

Input: Bird
The fossil record indicates that birds are the last surviving dinosaurs, having evolved from feathered ancestors within the theropod group of saurischian dinosaurs. True birds first appeared during the Cretaceous period, around 100 million years ago. DNA-based evidence finds that birds diversified dramatically around the time of the CretaceousPaleogene extinction event that killed off all other dinosaurs. Birds in South America survived this event and then migrated to other parts of the world via multiple land bridges while diversifying during periods of global cooling. Primitive bird-like dinosaurs that lie outside class Aves proper, in the broader group Avialae, have been found dating back to the mid-Jurassic period. Many of these early "stem-birds", such as Archaeopteryx, were not yet capable of fully powered flight, and many retained primitive characteristics like toothy jaws in place of beaks, and long bony tails.

When did true birds first appear?
Output: Cretaceous period

Input: Royal Dutch Shell
The presence of companies like Shell in the Niger-Delta has led to extreme environmental issues in the Niger Delta. Many pipelines in the Niger-Delta owned by Shell are old and corroded. Shell has acknowledged its responsibility for keeping the pipelines new but has also denied responsibility for environmental causes. This has led to mass protests from the Niger-Delta inhabitants and Amnesty International against Shell and Friends of the Earth Netherlands. It has also led to action plans to boycott Shell by environmental groups, and human rights groups. In January 2013, a Dutch court rejected four out of five allegations brought against the firm over oil pollution in the Niger Delta but found a subsidiary guilty of one case of pollution, ordering compensation to be paid to a Nigerian farmer.

Environmental and human rights groups have created action plans to do what?
Output: boycott Shell

Input: Uranium
The most common forms of uranium oxide are triuranium octoxide (U
3O
8) and UO
2. Both oxide forms are solids that have low solubility in water and are relatively stable over a wide range of environmental conditions. Triuranium octoxide is (depending on conditions) the most stable compound of uranium and is the form most commonly found in nature. Uranium dioxide is the form in which uranium is most commonly used as a nuclear reactor fuel. At ambient temperatures, UO
2 will gradually convert to U
3O
8. Because of their stability, uranium oxides are generally considered the preferred chemical form for storage or disposal.

In what form is uranium most often used as fuel for nuclear reactors?
Output:
Uranium dioxide