Here is a question about this article: On December 16, 2015, the Supreme Court of India mandated several restrictions on Delhi's transportation system to curb pollution. Among the measures, the court ordered to stop registrations of diesel cars and sport utility vehicles with an engine capacity of 2,000 cc and over until March 31, 2016. The court also ordered all taxis in the Delhi region to switch to compressed natural gas by March 1, 2016. Transportation vehicles that are more than 10 years old were banned from entering the capital.
What is the answer to this question: Which transportation vehicles were banned from entering New Delhi?
****
So... vehicles that are more than 10 years old

Here is a question about this article: Other states with long histories of no death penalty include Wisconsin (the only state with only one execution), Rhode Island (although later reintroduced, it was unused and abolished again), Maine, North Dakota, Minnesota, West Virginia, Iowa, and Vermont. The District of Columbia has also abolished the death penalty; it was last used in 1957. Oregon abolished the death penalty through an overwhelming majority in a 1964 public referendum but reinstated it in a 1984 joint death penalty/life imprisonment referendum by an even higher margin after a similar 1978 referendum succeeded but was not implemented due to judicial rulings.
What is the answer to this question: In what year did an Oregon referendum succeed in restoring the death penalty, only to be shot down due to a court ruling?
****
So... 1978

Here is a question about this article: Information of the oldest teachings may be obtained by analysis of the oldest texts. One method to obtain information on the oldest core of Buddhism is to compare the oldest extant versions of the Theravadin Pali Canon and other texts.[note 27] The reliability of these sources, and the possibility to draw out a core of oldest teachings, is a matter of dispute.[page needed][page needed][page needed][page needed] According to Vetter, inconsistencies remain, and other methods must be applied to resolve those inconsistencies.[note 28]
What is the answer to this question: What is in dispute regarding the research into the core of the teachings?
****
So...
The reliability