In this task, you are given a context paragraph, a question based on that and corresponding answer of a question. Your task is to generate supporting fact/knowledge from context paragraph which helps in answering a given question.
One example: North Willingham is a village and civil parish in the West Lindsey district of Lincolnshire, England. The population of the civil parish (including Sixhills) was 181 at the 2011 census. It is situated 3.5 mi east from the town of Market Rasen on the A631 road between Market Rasen and Louth. Question: Which had a bigger population at the 2011 census, North Willingham or Market Rasen? Answer: Market Rasen
Solution is here: Fact_1: North Willingham is a village and civil parish in the West Lindsey district of Lincolnshire, England. Fact_2: The population of the civil parish including Sixhills was 181 at the 2011 census.
Explanation: Here, we can see that both generated facts are helpful in answering question.

Now, solve this: Guilin, formerly romanized as Kweilin, is a prefecture-level city in the northeast of China's Guangxi Zhuang Autonomous Region. It is situated on the west bank of the Li River and borders Hunan to the north. Its name means "Forest of Sweet Osmanthus", owing to the large number of fragrant sweet osmanthus trees located in the city. The city has long been renowned for its scenery of karst topography and is one of China's most popular tourist destinations. Question: China Southern Airlines Flight 3943 used to fly to an airport in a city situated on the west bank of which river ? Answer: the Li River
Solution:
It is situated on the west bank of the Li River and borders Hunan to the north.