" The Silmarillion " , edited by Tolkien 's son Christopher from his father 's manuscripts and published in 1977 five years after Tolkien 's death , contains a part " Akallabêth " .
Head entity: the silmarillion Q79762 1 2
Tail entity: akallabêth Q331142 31
Relation (head \u2192 tail): P527
Inverse relation (tail \u2192 head): P361