To relate s.t. (from beginning to end).
It can be a personal experience or s.t. one has heard. It may be told in prose or sung as a ballad.
When he tells a story he relates it from the beginning.
When people quarrel one says: don’t relate it from beginning to end.
When I tell something I don’t know how to relate it.
He is able to relate about the time of the war with the Japanese.