Input: Article: Due to the work nature of airline pilots, who often cross several timezones and regions of sunlight and darkness in one day, and spend many hours awake both day and night, they are often unable to maintain sleep patterns that correspond to the natural human circadian rhythm; this situation can easily lead to fatigue. The NTSB cites this as contributing to many accidents[unreliable medical source?] and has conducted several research studies in order to find methods of combating fatigue in pilots.

Now answer this question: What has the NTSB conducted to find the cause of pilot fatigue?

Output: research studies

Input: Article: Today, with a long cultural tradition and strong support from local educational institutions, Nanjing is commonly viewed as a "city of culture" and one of the more pleasant cities to live in China.

Now answer this question: Does Nanjing have a long or short tradition of culture?

Output: a long cultural tradition

Input: Article: Impermanence (Pali: anicca) expresses the Buddhist notion that all compounded or conditioned phenomena (all things and experiences) are inconstant, unsteady, and impermanent. Everything we can experience through our senses is made up of parts, and its existence is dependent on external conditions. Everything is in constant flux, and so conditions and the thing itself are constantly changing. Things are constantly coming into being, and ceasing to be. Since nothing lasts, there is no inherent or fixed nature to any object or experience. According to the doctrine of impermanence, life embodies this flux in the aging process, the cycle of rebirth (samsara), and in any experience of loss. The doctrine asserts that because things are impermanent, attachment to them is futile and leads to suffering (dukkha).

Now answer this question: Why is attachment to things futile?

Output:
because things are impermanent