Complex sentence: In 1981 and 1982 there were two accidental launches of Harpoon missiles: one by the USN and the other by the Danish Navy, which destroyed and damaged buildings in the recreational housing area Lumsås.
Split into simpler sentences: In 1981 and 1982 there were two accidental launches of Harpoon missiles. One by the USN and another by the Danish Navy, which destroyed and damaged buildings in the recreational housing area Lumsås.