Question: What country were both Chonghaejin Marine and Sinking of MV Sewol located in?

Context paragraphs:
Ferguson Marine Engineering: Ferguson Marine Engineering Ltd is a shipyard located in Port Glasgow on the River Clyde in Scotland.  It is the last remaining shipbuilder on the lower Clyde, and is currently the only builder of merchant ships on the river - the company's mainstay has long been Roll-on/roll-off ferries, primarily for Caledonian MacBrayne, the largest of which is the Oban-Castlebay ferry MV "Isle of Lewis", which is also Ferguson's largest product ever built.  Ferguson's also built three of the world's first roll-on/roll-off Hybrid powered Car ferries MV Catriona, MV Hallaig and MV Lochinvar.  Ferguson's has built over 360 ships.

Yong Hyein: Yong Hyein is a civil society activist in South Korea.  She first proposed the silent march campaign, "Stay where you are", that originated in an announcement made during the Sinking of MV "Sewol" in 2014.

USS LSM-45: USS "LSM-45 is a "LSM-1"-class medium landing ship built for the United States Navy during World War II.  The ship also served as Ypoploiarchos Grigoropoulos" (L161) in the Hellenic Navy from 1958 to 1993.  She was the last known surviving LSM in its original configuration.  Currently located at Marine Corps Base Camp Lejeune in North Carolina, "LSM-45" was donated to the Museum of the Marine by the now defunct Amphibious Ship Museum under the understanding that it would be put on display at the museum, and was towed to North Carolina in 2004 from Omaha, Nebraska.  The museum decided in 2007 that the ship will not be a part of the museum and is looking for another home for the ship.  In 2009, there were reports that the Museum was considering scrapping or sinking the ship as an artificial reef.  The ship was scrapped sometime between 2010 and 2014.

Chonghaejin Marine: Chonghaejin Marine Company Ltd. or Cheonghaejin Marine Company Ltd. (Hangul: 청해진해운 ; Hanja: 淸海鎭海運 ; RR: "cheong-hae-jin-hae-un " ) was a South Korean shipping company that operated the ferry MV "Sewol", which sank en route from Incheon towards Jeju on 16 April 2014.  The "Sewol" capsized in the Maenggol Channel carrying 476 people, mostly secondary school students from Danwon High School; 172 passengers and crew survived, while 304 were drowned or still missing.

USS LSM-297: USS "LSM-297 is a "LSM-1"-class medium landing ship built for the United States Navy during World War II.  The ship also served as Ypoploiarchos Grigoropoulos" (L161) in the Hellenic Navy from 1958 to 1993.  She was the last known surviving LSM in its original configuration.  Currently located at Marine Corps Base Camp Lejeune in North Carolina, "LSM-297" was donated to the Museum of the Marine by the now defunct Amphibious Ship Museum under the understanding that it would be put on display at the museum, and was towed to North Carolina in 2004 from Omaha, Nebraska.  The museum decided in 2007 that the ship will not be a part of the museum and is looking for another home for the ship.  In 2009, there were reports that the Museum was considering scrapping or sinking the ship as an artificial reef.  The ship was scrapped sometime between 2010 and 2014.

MV Argo Merchant: MV "Argo Merchant was a Liberian-flagged oil tanker built by Howaldtswerke in Hamburg, Germany in 1953, most noted for running aground and subsequent sinking southeast of Nantucket Island, Massachusetts, causing one of the largest marine oil spills in history.  Throughout the vessel's troubled past, she was involved in more than a dozen major shipping incidents including two other groundings; once in Indonesia while named Permina Samudra III, and again in Sicily while named Vari"; and a collision in Japan.

Monitor National Marine Sanctuary: Monitor National Marine Sanctuary is the site of the wreck of the USS "Monitor", one of the most famous shipwrecks in U.S. history.  It was designated as the country's first national marine sanctuary on January 30, 1975, and is one of only two of the thirteen national marine sanctuaries created to protect a cultural resource rather than a natural resource.  The sanctuary comprises a column of water 1 nmi in diameter extending from the ocean’s surface to the seabed around the wreck of the Civil War ironclad, which lies 16 nmi south-southeast of Cape Hatteras, North Carolina.  Average water depth in the sanctuary is 230 ft .  Since its sinking in 1862, the "Monitor" has become an artificial reef attracting numerous fish species, including amberjack, black seabass, oyster toadfish and great barracuda.

Upside Down (2015 film): Upside Down () is a South Korean documentary film about the sinking of the MV "Sewol", directed by Kim Dong-bin.

Sinking of MV Sewol: The sinking of "Sewol" (Hangul: 세월호 침몰 사고 ; Hanja: 世越號沈沒事故 ), also referred to as the "Sewol Ferry Disaster", occurred on the morning of 16 April 2014, en route from Incheon to Jeju in South Korea.  The Japanese-built South Korean ferry sank while carrying 476 people, mostly secondary school students from Danwon High School (Ansan City).  The 6,825-ton vessel sent a distress signal from about 2.7 km north off Byeongpungdo at 08:58 Korea Standard Time (23:58 UTC, 15 April 2014).  In total, 304 passengers and crew members died in the disaster.  Of the approximately 172 survivors, more than half were rescued by fishing boats and other commercial vessels that arrived at the scene approximately 40 minutes after the South Korean coast guard.

The Truth Shall Not Sink with Sewol: The Truth Shall Not Sink with Sewol (; lit.  Diving bell) is a South Korean documentary film about the sinking of the MV "Sewol", directed by Lee Sang-ho and Ahn Hae-ryong.

Supporting paragraphs: Chonghaejin Marine Sinking of MV Sewol
Answer: South Korea