Question: The fourth studio album by death metal band Mortician takes its title from a slogan used to promote a film that was preceded by what 1968 film?

Context paragraphs:
Darkest Day of Horror: Darkest Day of Horror is the fourth studio album by death metal band Mortician.  It takes its title from a slogan used to promote the George A. Romero film "Day of the Dead".

The Final Bloodbath Session: The Final Bloodbath Session is a live album by death metal band Mortician.

Mortal Massacre: Mortal Massacre is the first CD release by New York City death metal band Mortician.  It consists of their "Brutally Mutilated" 7" vinyl EP and "Mortal Massacre" (hence the title) 7" vinyl EP, and live tracks recorded at two separate shows.

Hacked up for Barbecue: Hacked Up for Barbecue is the first full-length studio album by the death metal band Mortician.  The album has gone out of print, and has since been reissued as a two-on-one package with the band's "Zombie Apocalypse EP".

Incantation (band): Incantation is an American death metal band that was formed by John McEntee and Paul Ledney in 1989.  They are one of the leaders in the New York City death metal scene along with fellow bands Suffocation, Mortician and Immolation, even though the band is currently located in Johnstown, Pennsylvania.  To date the band has released ten full-length records, two live records, four EPs, two singles, three splits, one DVD, and three demos.  Their most recent album "Profane Nexus" was released through Relapse Records in August 2017.  The band have maintained a significant cult following and underground popularity since the 90s, and are considered to be highly influential on a range of later death metal bands including Dead Congregation, Grave Miasma, and Portal, who are often described as 'cavernous death metal'.  Incantation's music frequently draws on anti-Christian, Satanic and occult themes, and the band is notable for mixing widely varied tempos into their music, often playing slow, down-tuned passages similar to those performed by death-doom bands like Autopsy.

Chainsaw Dismemberment: Chainsaw Dismemberment is the second full-length studio album by death metal band Mortician.

Zombie Massacre Live!: Zombie Massacre Live!  is a live album by death metal band Mortician.

George Fisher (musician): George "Corpsegrinder" Fisher (born July 8, 1969) is an American extreme metal vocalist for the American death metal band Cannibal Corpse, the lesser-known melodic death metal band Paths of Possession, and the lesser-known extreme metal supergroup Serpentine Dominion.  He recorded two albums with Florida's Monstrosity before leaving and joining Cannibal Corpse in late 1995, replacing vocalist Chris Barnes, who is now the vocalist for Six Feet Under.  He also provided guest vocals for New York technical death metal band Suffocation on the songs "Reincremation" and "Mass Obliteration" from their debut album, "Effigy of the Forgotten", as well as guest vocals for California deathcore band Suicide Silence on the song "Control" from their fourth album, "You Can't Stop Me".  Fisher also performed guest vocals on Job for a Cowboy's 2014 album "Sun Eater" on the song "The Synthetic Sea."  As a death metal vocalist, Fisher employs the "death growl" extended vocal technique.

Day of the Dead (1985 film): Day of the Dead is a 1985 American horror film written and directed by George A. Romero and the third film in Romero's "Dead" series, being preceded by "Night of the Living Dead" (1968) and "Dawn of the Dead" (1978).

Brutally Mutilated: Brutally Mutilated is a 7" vinyl EP by the death metal band Mortician.  It was recorded prior to the band's involvement with Relapse Records Only 1000 copies of the EP were pressed.

Supporting paragraphs: Darkest Day of Horror Day of the Dead (1985 film)
Answer: Night of the Living Dead