Question: Marriott's Ko Olina Beach Club is located in what county?

Context paragraphs:
Andria Tupola: Andria Tupola (born 1980) is an American politician and a Republican member of the Hawaii House of Representatives since December 2014 representing District 43 (Māʻili, Nānākuli, Ko Olina, Honokai Hale, Kalaeloa, Ewa).  In 2015, she served as the minority floor leader for one year.  She currently serves as the Minority Leader making her the first Samoan woman to serve in this position.

Ko Olina Beach Park: Ko Olina Beach Park is a public park on the west side of the island of Oahu, Hawaii within the Ko Olina Resort Community, part of the City and County of Honolulu.  Located at the end of several high-end vacation resorts, the park is situated between the man made lagoon and the Ko Olina Marina.

Marriott's Ko Olina Beach Club: Marriott's Ko Olina Beach Club is a hotel in Ko Olina, Hawaii, a resort community in Kapolei.  It is located 30 minutes away from Honolulu on the western side of Oahu.  Opened in 2003, the hotel consists of three resort towers, each housing roughly 200 units.  The resort is expected to construct a fourth and final tower in the near future which would add an additional 202 units to the property.

Lotte Championship: The Lotte Championship is a women's professional golf tournament on the LPGA Tour.  It debuted in April 2012 at the Ko Olina Golf Club in Kapolei, Hawaii.

Aulani: Aulani, a Disney Resort & Spa is a beachside hotel, resort and vacation destination offering complimentary children's activities and programs at the Ko Olina Resort & Marina in Kapolei on the Hawaiian island of Oahu.  Part of the Disney Vacation Club, it is the third Disney Vacation Club Resort located outside of a Disney theme park property.  The resort opened on August 29, 2011.

Ko Olina Resort: Ko Olina Resort is a 642 acre master-planned vacation and residential community on the leeward coast of Oahu, 17 mi northwest of Honolulu.  Ko Olina has 2 mi of coastal frontage and includes three natural and four man-made lagoons with white-sand beaches.  It is home to four hotel and vacation-club resorts: Aulani, a Disney Resort & Spa; the Ihilani Resort & Spa, Marriott's Ko Olina Beach Club, and The Four Seasons at Ko Olina, as well as several resort condominiums and villa homes.  Previously, the JW Marriott at Ko Olina occupied The Four Seasons property.  An Atlantis Resort, similar to Atlantis Dubai, is currently being designed as an international destination for millennial travelers.  The property will be adjacent to the condominiums located on lagoon three.

Ko Olina Senior Invitational: The Ko Olina Senior Invitational was a golf tournament on the Champions Tour played only in 1992.  It was played in Ewa Beach, Hawaii at the Ko Olina Golf Club.  The purse for the tournament was US$500,000, with $75,000 going to the winner, Chi-Chi Rodríguez.

Kapolei, Hawaii: Kapolei is a master-planned community in Honolulu County, Hawaii, United States, on the island of Oahu.  It is colloquially known as the "second city" of Oahu, in relation to Honolulu.  Officially, it is a census-designated place (CDP) within the consolidated city-county of Honolulu.

Ko Olina Station and Center: Ko Olina Station and Ko Olina Center make up a lifestyle center in the resort town of Ko Olina, a neighborhood in Kapolei, Hawaii.  The shopping mall opened in 2009 and consists of two centers located across a street from each other.  Ko Olina Station debuted in 2009, while the more recent Ko Olina Center finished construction in 2010.  The centers contain a total of approximately 31 retail tenants, with the majority of them being native Hawaiian businesses, such as ABC Stores and Peter Merriman's MonkeyPod Kitchen.

Fields Open in Hawaii: The Fields Open in Hawaii was a golf tournament for professional female golfers, played on the LPGA Tour.  It was held from 2006 and 2008 at the Ko Olina Resort in Kapolei, an incorporated community within the city of Honolulu, Hawaii.

Supporting paragraphs: Marriott's Ko Olina Beach Club Kapolei, Hawaii
Answer: Honolulu County