Complex sentence: Major-General Sir John Hanbury-Williams GCVO, KCB, CMG, was Her Majesty's Marshal of the Diplomatic Corps in the Royal Household of the Sovereign of the United Kingdom from 1920 to 1934.
Split into simpler sentences: Major-General Sir John Hanbury-Williams GCVO, KCB, CMG. He was Her Majesty's Marshal of the Diplomatic Corps in the Royal Household of the Sovereign of the United Kingdom from 1920 to 1934.