Question: The pornahraphic film based on the unidentified killer of four men and three women, in the Bay Area in the 1960's and 1970's was released in what year?

Context paragraphs:
Babel 250: Babel 250 () is a South Korean reality television program on tvN, which first aired on July 11, 2016.  The show features a cast of four men and three women, all from different countries, who live together as an experiment, speaking their own languages and attempting to create a universal one.  The show's title is loosely based on the story of the Tower of Babel and 250 family of languages currently in use in the world.

Malta at the 1980 Summer Paralympics: Malta participated in the 1980 Summer Paralympics in Arnhem, thus returning to the Games after being absent (for the first time) in 1976.  The country sent seven representatives (four men and three women) to compete in athletics and lawn bowls.

Liechtenstein at the 1992 Summer Olympics: Liechtenstein competed at the 1992 Summer Olympics in Barcelona, Spain.  Seven competitors, four men and three women, took part in eight events in four sports.

Bjugn affair: The Bjugn affair in 1992 in Bjugn, Norway, started with the arrest of three women and four men and led to one, Ulf Hammern, being charged for allegedly having molested children.  He was acquitted 31 January 1994 at Frostating Court of Appeal.

Zodiac Rapist: Zodiac Rapist (also known as Zodiac Killer) is a pornographic horror film released in 1971.  The film is loosely based on the crimes of California serial killer the Zodiac.

Zodiac Killer: The Zodiac Killer or Zodiac was a serial killer who operated in northern California in the late 1960s and early 1970s.  The killer's identity remains unknown.  The Zodiac murdered victims in Benicia, Vallejo, Lake Berryessa, and San Francisco between December 1968 and October 1969.  Four men and three women between the ages of 16 and 29 were targeted.  The killer originated the name "Zodiac" in a series of taunting letters sent to the local Bay Area press.  These letters included four cryptograms (or ciphers).  Of the four cryptograms sent, only one has been definitively solved.

Laugh? I Nearly Went to Miami!: Laugh?  I Nearly Went to Miami!  is a stage comedy by Miles Tredinnick.  It was first produced in Hampstead, London, in 1985 and published the following year by Samuel French Ltd.  A revised Kindle eBook version was released in 2012.  It has been translated into many languages and is regularly produced around the world.  It has a cast of four men and three women.  A sequel, "It's Now or Never! ", was published in 1991 by Warner Chappell Plays.

Taso N. Stavrakis: Taso Nicholas Stavrakis (born July 12, 1957) is an American film and television actor and stunt performer best known for his appearances in the George A. Romero films "Dawn of the Dead", "Knightriders", and "Day of the Dead".  Recruited by his good friend and Carnegie-Mellon University classmate Tom Savini, Stavrakis assisted with stunts and special makeup effects on several seminal 1980s horror productions, including the original "Friday the 13th", in which he portrayed "The Prowler" (as the unidentified killer was initially referred to in Victor Miller's screenplay).  Romero frequently joked that Stavrakis should be included in the Guinness Book of World Records for having appeared as the most zombies in his "Dead" series (5 in "Dawn" and 4 in "Day").

Paturis Park murders: The Paturis Park murders are a series of 13 murders of gay men committed between February 2007 and August 2008.  The murders took place in Paturis Park ("Parque dos Paturis") in Carapicuíba, Brazil, and were perpetrated by an unidentified killer dubbed the "Rainbow Maniac".

Bay Area Figurative Movement: The Bay Area Figurative Movement (also known as the Bay Area Figurative School, Bay Area Figurative Art, Bay Area Figuration, and similar variations) was a mid-20th Century art movement made up of a group of artists in the San Francisco Bay Area who abandoned working in the prevailing style of Abstract Expressionism in favor of a return to figuration in painting during the 1950s and onward into the 1960s.

Supporting paragraphs: Zodiac Rapist Zodiac Killer
Answer: 1971