When casting Resurrection, how much of a body do you need to count it as a ‘creature’?

@JeremyECrawford When casting Resurrection, how much of a body do you need to count it as a 'creature'?

— Thomas Wojcik (@LolomirNL) September 5, 2017

Resurrection restores any missing body parts, so it doesn't need much of a corpse to work. The exact amount is up to the DM. #DnD https://t.co/C2Y3XE7aac

— Jeremy Crawford (@JeremyECrawford) September 6, 2017