title: Lesbos
context: Lesbos (/ˈlɛzbɒs/, US: /ˈlɛzboʊs/; Greek: Λέσβος Lesbos, pronounced[ˈlezvos]) is an island located in the northeastern Aegean Sea. It has an area of 1,633km2 (631sqmi)[1] with 320 kilometres (199 miles) of coastline, making it the third largest island in Greece. It is separated from Turkey by the narrow Mytilini Strait and in late Palaeolithic/Mesolithic times[2] was joined to the Anatolian mainland before the end of the last glacial period.
question: How large is the island of Lesbos?
answers: 1,633km