Instructions: In this task, you're given a statement, further information available on a particular linked term from the statement, and a question. Your job is to generate the answer to the question by using the information provided. If there is no clear answer obtainable, output 'none'.
Input: Context: It is the third largest coral barrier reef system in the world Link Information: The Great Barrier Reef is the world's largest coral reef system composed of over 2,900 individual reefs and 900 islands stretching for over 2300 km over an area of approximately 344400 km2. Question: What is the ranking order from largest to the smallest of the three largest coral barrier reef systems in the world?
Output:
Answer: Great Barrier Reef