Question: What year was the series to which the episode "Slicked-up Pup" belongs created?

Context paragraphs:
The Athlete (1932 film): The Athlete is a 1932 short animated film by Walter Lantz Productions, and distributed by Universal Pictures.  The film is the first of a film series featuring Pooch the Pup, the first star character created by Walter Lantz.

My Heart Belongs to Daddy (Desperate Housewives): "My Heart Belongs to Daddy" is the 27th episode of the ABC television series, "Desperate Housewives".  It was the fourth episode of the show's second season.  The episode was written by John Pardee and Joey Murphy and was directed by Robert Duncan McNeill.  It originally aired on Sunday, October 16, 2005.

Rash Decisions: "Rash Decisions" is the thirteenth episode of the sixth season of the American sitcom "Modern Family", and the series' 133rd episode overall.  It originally aired on February 4, 2015.  The episode's story is by Anthony Lombardo & Clint McCray while the teleplay belongs to Daisy Gardner.  It was directed by Jim Hensz.

Slicked-up Pup: Slicked-up Pup is a 1951 American one-reel animated cartoon and is the 60th "Tom and Jerry" cartoon directed by William Hanna and Joseph Barbera and produced by Fred Quimby.  The cartoon was scored by Scott Bradley and animated by Ed Barge, Kenneth Muse, Irven Spence and Ray Patterson.  It features the second appearance of both Spike and Tyke together (although Tyke is referred to as 'Chip').

Chucklewood Critters: Chucklewood Critters is an American line of television specials and an animated television series created by former Hanna-Barbera animators, Bill Hutten and Tony Love, which centered on two North American woodland animals: Buttons, a young bear cub, and Rusty, a young fox pup.  It started as a Christmas special in 1983 called " The Christmas Tree Train", followed by eight more holiday/seasonal specials.  In 1997 it was developed into a series entitled "The New Chucklewood Critters", which ran for two seasons.

Phineas and Ferb: Summer Belongs To You!: "Phineas and Ferb: Summer Belongs to You!"  is a special episode of the animated television series "Phineas and Ferb."  and is part of the second season.  It was aired on Disney XD on August 2, 2010 and Disney Channel on August 6, 2010.  It is the first one-hour special, beating Phineas and Ferb's Christmas Vacation which is 45 minutes long with commercials.  This episode was first seen at Comic-Con on July 25 from 3pm to 4pm in San Diego, California.

Tom and Jerry: Tom and Jerry is an American animated series of short films created in 1940, by William Hanna and Joseph Barbera.  It centers on a rivalry between its two title characters, Tom and Jerry, and many recurring characters, based around slapstick comedy.

Laren Bright: Laren Bright is a writer who worked at Hanna Barbera Productions and Warner Bros. Laren Bright worked on Hanna Barbera shows like "The Snorks", "A Pup Named Scooby-Doo", "Wake, Rattle, and Roll" (Fender Bender 500 segments), "Pirates of Dark Water", "Captain Planet", and other shows.  Laren Bright was Story Editor/Writer for Batman Animated Series.  Laren Bright was one of story editors for Emmy winning Batman Animated Series episode "Robin's Reckoning Part 1."  Here are Pirates of Dark Water episodes Laren Bright worked on.

Toby the Pup: Toby the Pup is an animated cartoon character created by animators Sid Marcus, Dick Huemer, and Art Davis.  He starred in a series of early sound shorts produced by Charles B. Mintz for RKO Radio Pictures.  The series lasted from 1930 to 1931.  Twelve cartoons were produced, though very few still survive today.

Belizean municipal elections, 1989–91: Belize municipal elections, 1989–1991 were a series of local elections held in the country of Belize in two parts.  Part one was the Belize City Council election held on December 6, 1989, in which the newly elected People's United Party swept all nine seats in Belize City.  Part two came more than a year later on March 25, 1991 with municipal elections in the district towns.  Here the PUP won 35 of 49 seats, while the UDP won the remaining fourteen.

Supporting paragraphs: Slicked-up Pup Tom and Jerry
Answer: 1940