Complex sentence: Michael Cashman becomes first openly-gay UK member elected to the European Parliament.The British Museum acquired the Warren Cup for £1.8 million to prevent its going abroad which, at that time, the most expensive single item ever acquired by The British Museum.
Split into simpler sentences: Michael Cashman becomes first openly-gay UK member elected to the European Parliament.The British Museum acquired the Warren Cup for £1.8 million to prevent its going abroad. This was, at that time, the most expensive single item ever acquired by The British Museum.