Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Name | Type | Themed area | Manufacturer | Opened |
| --- | --- | --- | --- | --- |
| Australian Animal Presentation | Animal show | Australian Wildlife Experience | Dreamworld | 2009 |
| Australian Sheep Shearing Show | Animal show | Australian Wildlife Experience | Dreamworld | 2010 |
| Australian Wildlife Experience | Animal exhibit | Australian Wildlife Experience | Dreamworld | 2001 |
| Avis Vintage Cars | Vintage Cars ( Ford Model T ) | Australian Wildlife Experience | Ford Motor Company | 1981 |
| Big Brother | Television Program | Dreamworld Studios | Channel 9 and Endemol | 2001–2008, 2012– |
| Big Red Boat Ride | Rockin' Tug | Wiggles World | Zamperla | 2012 |
| Big Red Car Ride | Dark ride | Wiggles World | Simtech | 2005 |
| BuzzSaw | Steel roller coaster | Town of Gold Rush | Maurer Söhne | 2011 |
| The Claw | Gyro Swing | Ocean Parade | Intamin | 2004 |
| Cyclone | Steel roller coaster | Ocean Parade | Arrow Dynamics | 2001 |
| Dorothy's Rosy Tea Cup Ride | Teacups | Wiggles World | SBF Visa | 2006 |
| Dreamworld Cinema | Movie theatre | Main Street | RealD Cinema | 2011 |
| Dreamworld Railway | Railway | Main Street | Baldwin /Perry | 1981 |
| Dronkey Flyers | Children's rotating ride | DreamWorks Experience | SBF Visa | 2000 |
| Escape from Madagascar | Suspended family roller coaster | DreamWorks Experience | Vekoma | 2002 |
| FlowRider | Sheet wave attraction | Ocean Parade | Wave Loch | 2006 |
| Game Site | Video arcade | Ocean Parade | Dreamworld | 1983 |
| The Giant Drop | Drop tower | Rocky Hollow | Intamin | 1998 |
| Gingy's Glider | Kite flyer | DreamWorks Experience | Zamperla | 2008 |
| Illuminate Light & Laser Spectacular | Seasonal light and laser show | Main Street | Laservision | 2010 |
| King Julien's Theatre in the Wild | Show arena | DreamWorks Experience | Dreamworld | 2012 |
| The Lair | Animal exhibit | Adjacent to Tiger Island | Dreamworld | 2011 |
| MAD Jungle Jam | Ball play area | DreamWorks Experience | Prime Play | 2002 |
| Mick Doohan's Motocoaster | Launched roller coaster | Rivertown | Intamin | 2007 |
| Pandamonium | Air Race | DreamWorks Experience | Zamperla | 2012 |
| Reef Diver | Enterprise | Ocean Parade | S.D.C. | 1983 |
| Rock Climbing Wall | Climbing wall | Ocean Parade | Unknown | 2004 |
| Puss in Boots Sword Swing | Swinger | DreamWorks Experience | Chance Rides | 1982 |
| Rocky Hollow Log Ride | Log flume | Rocky Hollow | Dreamworld | 1981 |
| Shockwave | Disk'O Coaster | Ocean Parade | Zamperla | 2011 |
| Shrek's Ogre-Go-Round | Carousel | DreamWorks Experience | Ferrari | 1983 |
| Skadoosh | Dodgems | DreamWorks Experience | Bertazzon Rides | 1983 |
| Thunder River Rapids Ride | River rafting ride | Town of Gold Rush | Intamin | 1986 |
| Tiger Island | Animal exhibit | Tiger Island | Dreamworld | 1995 |
| Tower of Terror II | Shuttle roller coaster | Rivertown | Intamin | 1997 |
| V8 Supercars RedLine | Racing simulator | Ocean Parade | Dreamworld | 2008 |
| Wipeout | Waikiki Wave Super Flip | Ocean Parade | Vekoma | 1993 |
| Zombie Evilution | Laser tag | Ocean Parade | Sudden Impact | 2013 |
Question:
Which type had an unknown manufacturer?
Answer:
Climbing wall