Complex sentence: The airport is located at Elvebakken and Altagård, on the southern shore of the Altafjord and at the mouth of the river of Altaelva, which is about east of Bossekop, the town center of Alta.
Split into simpler sentences: The airport is located at Elvebakken and Altagård, on the southern shore of the Altafjord and at the mouth of the river of Altaelva. It is about east of Bossekop, the town center of Alta.