If you need to determine the subject of this sentence, that would be Dorothy Parker and E.B. White.
However, this isn't a simple subject, because there are two people involved. This is why this is called a complete subject.
Answer:
Found this off of google, "The small rocky hollow in which he lay down to die was soon covered (and protected) by glacial ice that happened to be melting 5,300 years later when his body was discovered by modern humans. His nickname, Ötzi, stems from the Ötztal Alps, where he was found."