Assertion: archipelago's island | /r/HasProperty | km
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Source sentences:
text: The five main islands are: Sumatra, which is about 473,606 sq. km. in size; the most fertile and densely populated islands, Java/Madura, 132,107 sq. km; Kalimantan, which comprises two-thirds of the island of Borneo and measures 539,460 sq. km; Sulawesi, 189,216 sq. km; and Irian Jaya, 421,981 sq. km, which is part of the world's second largest island, New Guinea.