Complex sentence: Assisting Malcolm II of Scotland in repelling his old enemies the Danes, on two different occasions of their arrival in Scotland, he received a grant of land in the north of Scotland, East of Loch Lomand.
Split into simpler sentences: Assisting Malcolm II of Scotland in repelling his old enemies the Danes, on two different occasions. Upon their arrival in Scotland, he received a grant of land in the north of Scotland, East of Loch Lomand.