Question: What is the original nickname for the type of plane used in KLM Flight 861?
Sentence (from "KLM Flight 861"): KLM Flight 861, operated by a Boeing 747 registered PH-BUA and named "Mississippi", was hijacked on November 25, 1973, by three young Arabs over Iraqi airspace on a scheduled Amsterdam-Tokyo flight with 247 passengers on board.
Relevant evidence: Yes