Detailed Instructions: You are given a passage. Using the information present in the passage, you need to classify it into one of the 10 topics: 0 - 'Society & Culture', 1 - 'Science & Mathematics', 2 - 'Health', 3 - 'Education & Reference', 4 - 'Computers & Internet', 5 - 'Sports', 6 - 'Business & Finance', 7 - 'Entertainment & Music', 8 - 'Family & Relationships', 9 - 'Politics & Government'.
Q: At 840,000 square miles (2,175,590 km2), Greenland is the world's largest island.    Although Australia also meets the definition of an island (a piece of land surrounded by water), it is large enough to be considered its own continent.
A:
3