The black-and-white film from the year Adolf Hitler came to power purports to show future British king Edward VIII instructing his nieces, the current monarch Elizabeth, aged about six or seven at the time, and her three-year-old sister, Princess Margaret, how to perform the Nazi salute.
What is the relationship between 'Edward VIII' and 'king' in the context of the input sentence.
Options: position held, chairperson, headquarters location, product/material produced