Question: What fighter, trained by Riku Immonen, knocked out Andy Ogle in 8 seconds in a UFC fight?

Context paragraphs:
UFC Fight Pass: UFC Fight Pass is a subscription-based video streaming service owned by the Ultimate Fighting Championship.  The UFC Fight Pass consists of both a 24-hour linear streaming channel and on-demand programming from UFC's library.  UFC on-demand content launched for Xbox 360 on December 20, 2011.  Subscribers are able to view pay-per-view events in high definition, connect with friends to predict fight results, and have the ability to compare fighter statistics and records.  The UFC Fight Pass application was also planned for PlayStation 4 in early 2015.

Fox UFC: Fox UFC Fight Night (previously referred as Fox UFC Saturday for broadcasts on Fox or FS1 UFC Fight Night for broadcasts on other Fox-owned properties) is the branding used for telecasts of mixed martial art competitions from the Ultimate Fighting Championship (UFC) that are produced by Fox Sports.  Previously, "UFC on Fox" was also used as a blanket title for UFC events aired on the Fox network, although since the concurrent launch of Fox Sports 1 and rebranding of Fuel TV as Fox Sports 2 in August 2013, all live UFC broadcasts on Fox-owned networks (including preliminaries, "UFC Fight Night" and "The Ultimate Fighter Finale") have since used the name.

Ultraman Geed: Riku Asakura is a teenager with no knowledge of his past, save being found near an astronomical observatory as a baby following an universe-wide cataclysm called the Crisis Impact.  When a giant monster destroys his home, Riku and his alien roommate Pega stumble upon a secret base 500 meters under Earth.  Riku learns he an Ultraman in human form and is given the ability to use the Geed Riser transformation device and Ultra Capsules—items that each contain a fragment of an Ultraman's power—by base's operating system RE.M.  to become Ultraman Geed to save everyone.  But Riku later learns that he is the son of the instigator of the Crisis Impact: Ultraman Belial.  Deciding to fight against fate, he is joined by monster hunter Laiha Toba, AIB agent Moa Aizaki, and office worker Leito Igaguri, who becomes the host of Belial's nemesis Ultraman Zero.  Riku soon learns that the monsters he faces are Fusion Rise forms of Kei Fukuide, who seeks those who are hosts to unformed Ultra Capsules called Little Stars.  During the fight with Kei, the secret behind Riku's birth and Belial's grand plan will gradually came to light.

UFC Fight Night 6: UFC Fight Night: Sanchez vs. Parisyan (also known as UFC Fight Night 6) was a mixed martial arts event held by the Ultimate Fighting Championship on August 17, 2006.  The event took place at the Red Rock Resort Spa and Casino in Las Vegas, Nevada, and was broadcast live on Spike TV in the United States and Canada.  It acted as a lead-in to the season four premiere of "The Ultimate Fighter".  The two-hour broadcast of UFC Fight Night 6 on Spike TV drew a 1.5 overall rating.

Riku Immonen: Riku Immonen is a retired Finnish professional Muay Thai kickboxer and active muay thai coach.  He is an amateur and professional Muay Thai World Champion.  He trains fighters out of Turku Muay Thai.  Most well known students are UFC fighter Makwan Amirkhani, Topi Helin and Daniel Forsberg.  He trains also UFC fighter Teemu Packalen.

UFC Fight Night: Thomas vs. Florian: UFC Fight Night: Thomas vs. Florian (also known as UFC Fight Night 11) was a mixed martial arts (MMA) event held by the Ultimate Fighting Championship (UFC) on Wednesday, September 19, 2007 at the Palms Casino Resort in Las Vegas, Nevada.  It was broadcast live in the United States and Canada on Spike TV as a lead-in to the debut of "The Ultimate Fighter 6".

UFC Fight Night: Gustafsson vs. Manuwa: UFC Fight Night: Gustafsson vs. Manuwa (also known as UFC Fight Night 37) was a mixed martial arts event held on March 8, 2014, at The O2 Arena in London, England.  The event was shown live in the UK on Channel 5 and BT Sport and in the United States on UFC Fight Pass.

Makwan Amirkhani: Makwan Amirkhani (born November 8, 1988) is a Kurdish born with Finnish nationality mixed martial artist competing in the featherweight division of the Ultimate Fighting Championship.  Amirkhani is best known for his first round 8 second knockout on Andy Ogle which is one of the fastest knockouts in UFC history.

UFC Fight Night: Marquardt vs. Palhares: UFC Fight Night: Marquardt vs. Palhares (also known as UFC Fight Night 22) and originally scheduled as UFC Fight Night: Maia vs. Belcher, was a mixed martial arts event held by the Ultimate Fighting Championship on September 15, 2010 at the Frank Erwin Center in Austin, Texas.  The event also served as a lead in to the season premiere of "".

Topi Helin: Topi "Iron Ball" Helin (born November 21, 1978) is a retired Finnish professional Muay Thai kickboxer, four time Finnish Heavyweight Champion and amateur Muay Thai World Champion.  In 2003 he turned pro and had his first tournament in K-1 Scandinavia 2005 in Stockholm, Sweden.  He trained out of Turku Thaiboxing Club under his mentor and coach WMC World Champion Riku Immonen.

Supporting paragraphs: Riku Immonen Makwan Amirkhani
Answer: Makwan Amirkhani