Detailed 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'.
Q: Context: The largest number of islands of Africa are found in the Indian Ocean, with the sovereign island nations of Comoros, Seychelles, Mauritius and Madagascar located off the southeastern seaboard of Africa being the most notable. Link Information: At 1660 km2, excluding the contested island of Mayotte, the Comoros is the fourth-smallest African nation by area. Question: Which of the sovereign island nations of Africa is the largest?
A:
Answer: Madagascar