Question: In which year did this 235-acre amusement park in Kansas City, Missouri open that features the wooden roller coaster called "Timber Wolf?"
Context: Timber Wolf is a wooden roller coaster at Worlds of Fun in Kansas City, Missouri.  Timber Wolf was designed by Curtis D. Summers and was built by the Dinn Corporation.  It opened in April 1989. Hurricane: Category 5 was a Custom Coasters International wooden roller coaster located at the Myrtle Beach Pavilion.  It replaced the Corkscrew roller coaster which existed since the late 1970s.  The Pavilion unveiled their multimillion-dollar coaster May 6, 2000.  During operation, Hurricane held the record for being the tallest, fastest, and longest wooden roller coaster in South Carolina.  The ride closed with the Pavilion on September 30, 2006.  Although Burroughs & Chapin attempted to sell the ride along with the Haunted Hotel, Log Flume, Treasure Hunt, and a few other rides, the ride was deemed too expensive a task to dismantle and relocate, and was ultimately demolished in March 2007.  The only part of the ride not demolished were the two Gerstlauer trains used on the ride.  These trains were shipped to Kings Island, an amusement park in Mason, Ohio.  They were then repainted and installed on Son of Beast, which was at the time the world's tallest and fastest wooden roller coaster.  Son of Beast was later demolished on November 20, 2012, following an incident that occurred in 2009. A wooden roller coaster is most often classified as a roller coaster with running rails made of flattened steel strips mounted on laminated wooden track.  Occasionally, the support structure may be made out of a steel lattice or truss, but the ride remains classified as a wooden roller coaster due to the track design.  Because of the limits of wood, wooden roller coasters, in general, do not have inversions (when the coaster goes upside down), steep drops, or extremely banked turns (overbanked turns).  However, there are exceptions; the defunct Son of Beast at Kings Island had a 214 ft drop and originally had a 90 ft loop until the end of the 2006 season, although the loop had steel supports.  Other special cases are Hades 360 at Mount Olympus Water and Theme Park in Wisconsin Dells, Wisconsin.  The coaster features a double-track tunnel, a corkscrew, and a 90-degree banked turn.  There is also The Voyage at Holiday World (an example of a wooden roller coaster with a steel structure for supports) featuring three separate 90-degree banked turns.  Ravine Flyer II at Waldameer Park has a 90-degree banked turn, T Express at Everland in South Korea with a 77-degree drop, and Outlaw Run at Silver Dollar City which has 3 inversions and 120-degree overbanked turn. White Cyclone (ホワイトサイクロン , Howaito Saikuron ) is a wooden roller coaster at Nagashima Spa Land in Mie Prefecture, Japan.  At 1700 m in length, White Cyclone is the third longest wooden roller coaster in the world, and is the longest wooden roller coaster outside of the United States.  Despite its length, White Cyclone is still considerably shorter than the 2479 m Steel Dragon 2000, the world's longest steel roller coaster, which is also at Nagashima Spa Land.  In addition to being the third longest wooden roller coaster, White Cyclone is the seventh tallest wooden roller coaster in the world and the fourth tallest wooden roller coaster outside the United States.  A single ride on the White Cyclone costs ¥1,000 (approximately $9 USD), and the ride is restricted to those individuals above 1.3 m in height; and those individuals under 54 years of age. Lake Compounce is an amusement park located in Bristol and Southington, Connecticut; the lake itself lies completely in Southington.  Opened in 1846, it is the oldest continuously-operating amusement park in the United States.  The amusement park covers 332 acres (1.3 km²) of land, and also has a beach and a waterpark which can be used by guests for no extra charge.  The park was acquired from Kennywood Entertainment Company by Palace Entertainment, the U.S. subsidiary of Parques Reunidos.  In addition to the title for oldest consecutively run amusement park in the United States, it also has 14th oldest wooden roller coaster in the world, Wildcat.  Its other, newer wooden roller coaster, Boulder Dash, has won the Golden Ticket Award for the #1 Wooden Coaster in the World for 5 years, and held that record from 2013 to 2016. Outlaw Run is a wooden roller coaster located at the Silver Dollar City amusement park in Branson, Missouri.  The ride was the first wooden roller coaster manufactured by Rocky Mountain Construction and the first wooden roller coaster with multiple inversions, in which riders are turned upside-down and then back upright.  The 2937 ft ride features three inversions and a top speed of 68 mph , making "Outlaw Run" the sixth-fastest wooden roller coaster in the world.  The 162 ft first drop of the ride is the fourth steepest in the world among wooden roller coasters, at 81° beyond horizontal. The Boardwalk Bullet is a high-speed wooden roller coaster in Kemah, Texas, United States, that was opened August 31, 2007.  It is part of the Kemah Boardwalk amusement park.  Currently, it is the only wooden roller coaster in Greater Houston, and one of only three wooden coasters in Texas.  It is a 96 ft , 3236 ft twisted wooden roller coaster designed by The Gravity Group built on a 1 acre footprint, making it the one of the most compact wooden coasters in the world.  The bullet is one of the most popular rides at Kemah Boardwalk. Kings Island is a 364 acre theme park located in Mason, Ohio, 24 mi northeast of Cincinnati.  Since the opening of the amusement park in 1972, at least one attraction has been added every year except 1978, 1980, 1983, and 2008.  The park is known to have attractions such as Flight of Fear which was the world's first linear induction motor launched roller coaster, and The Beast which has held the record for the world's longest wooden roller coaster since its opening in 1979.  Also, The Beast continues to be ranked as one of the best wooden roller coasters in the world by industry polls.  Kings Island's newest attraction is Mystic Timbers, a wooden roller coaster manufactured by Great Coasters International.  With this addition, Kings Island claimed the record for most wooden roller coaster track of any amusement park in the world, and tied the record for most wooden roller coasters, with five. Worlds of Fun is a 235-acre amusement park in Kansas City, Missouri, United States.  The park opened in 1973 and is owned and operated by Cedar Fair, which purchased the park from Hunt-Midwest in 1995.  Admission to Worlds of Fun includes access to Oceans of Fun, a water park adjacent to the amusement park. Tonnerre de Zeus is a roller coaster at Parc Astérix in Plailly, France.  Opened in 1997 and built by Custom Coasters International, it is as of today the 2nd longest wooden coaster in Europe, after Colossos, with a track length of 1230m (4044 feet).  This coaster is also the second wooden roller coaster built in France after Walygator Parc's "Anaconda", and the second massive roller coaster of the park after "Goudurix", which was built since the park's opening in 1989.  These two roller coasters were followed by "la Trace du Hourra" in 2001, and "OzIris" in 2012.  No other wooden roller coaster was built in the hexagon until Walibi Rhône-Alpes' "Timber" in 2016.
Answer: 1973