[PAR] [TLE] Kong (roller coaster) [SEP] Kong is a steel Suspended Looping Coaster, made by Vekoma, located at Six Flags Discovery Kingdom in Vallejo, California. [PAR] [TLE] Six Flags Discovery Kingdom [SEP] Six Flags Discovery Kingdom (formerly known as Six Flags Marine World, Marine World, The New Marine World Theme Park, and Marine World Africa USA) is a 135-acre (55 ha) animal theme park located in Vallejo, California, roughly halfway between San Francisco and Sacramento on Interstate 80.  The park includes a variety of roller coasters and other amusement rides. Discovery Kingdom has been part of the Six Flags chain of amusement parks since 1999.
[PAR] [TLE] Kong ( roller coaster ) [ SEP ] Kong is a steel Suspended Looping Coaster , made by Vekoma , located at Six Flags Discovery Kingdom in Vallejo , California . [PAR] [TLE] Six Flags Discovery Kingdom [ SEP ] Six Flags Discovery Kingdom ( formerly known as Six Flags Marine World , Marine World , The New Marine World Theme Park , and Marine World Africa USA ) is a 135-acre ( 55 ha ) animal theme park located in Vallejo , California , roughly halfway between San Francisco and Sacramento on Interstate 80 . The park includes a variety of roller coasters and other amusement rides . Discovery Kingdom has been part of the Six Flags chain of amusement parks since 1999 .
What year was the California theme park, which features the steel Kong roller coaster, opened?
What year was the California theme park , which features the steel Kong roller coaster , opened ?
1999
1999