Complex sentence: Agnes de Launcekrona was the Lady of the Bedchamber to Queen consort Anne of Bohemia who became the second wife of Robert de Vere, 9th Earl of Oxford, a favourite of King Richard II of England.
Split into simpler sentences: Agnes de Launcekrona was Lady of the Bedchamber to Queen consort Anne of Bohemia. She became the second wife of Robert de Vere, 9th Earl of Oxford, a favourite of King Richard II of England.