Question: Are both Jimmie Ross and Jang Hyun-seung Americans?

Context paragraphs:
Jimmie Ross: Jimmie Ross is an American rock guitarist and vocalist who is best known for being a member of Pittsburgh band the Jaggerz, known for their 1970 hit "The Rapper".  During the band's initial existence of 1965-1976, the bassist shared the duties of lead vocalist with guitarist Donnie Iris.  By the time the Jaggerz regrouped in 1989, Iris was well into his solo career, and Ross became the sole lead vocalist and remained bassist.  He continues to hold both positions today.

Highlight (band): Highlight (Korean: 하이라이트 ) is a South Korean boy band formerly known as Beast (Korean: 비스트).  The band consists of five members: Yoon Doo-joon, Yong Jun-hyung, Yang Yo-seob, Lee Gi-kwang, and Son Dong-woon.  Original member Jang Hyun-seung officially left the group in April 2016.  Later that year, the five remaining members moved labels from Cube Entertainment to Around Us Entertainment and subsequently changed their name to Highlight in 2017.

Project Strato-Lab: Project Strato-Lab was a high-altitude manned balloon program sponsored by the United States Navy during the 1950s and early 1960s.  The Strato-Lab program lifted the first Americans into the upper reaches of the stratosphere since World War II.  Project Strato-Lab developed out of the Navy's unmanned balloon program, Project Skyhook.  The program was established in 1954 and administrated by Commander Malcolm Ross (United States Navy).  Malcolm Ross and others developed the program to accomplish research required for the manned rocket program to follow.  This program provided biomedical data that was used for subsequent efforts in space.  Malcolm Ross launched five numbered flights (Strato-Lab 1 through Strato-Lab 5) as well as other unnumbered flights.

Fox Island (Rhode Island): Fox Island is an island in Narragansett Bay, Rhode Island, in the United States of America.  It lies between Conanicut Island and North Kingstown just south of the village of Wickford, Rhode Island.  The island is a part of the town of North Kingstown.  The Native Americans called the island "Nanaquonset" (also "Nonequasset" or "Sonanoxet.")  The island was purchased from Native Americans by Randall Holden and Samuel Gorton in 1659.  In the 1860s a Christian preacher named Captain Jimmie Hammond became the first full-time resident of the island where he lived with his chickens and cat.  In 1880, Rev. William Pendleton Chapman, a pastor at the nearby Quidnessett Church, featured the island in his adventure book titled “Budd Boyd’s Triumph: The Boy Firm of Fox Island.”  Various other private owners have owned the island since its first habitation.  Since 2000 it has been privately owned by a corporation which uses a large wind generator on the east side of the island.

Jimmie Durham: Jimmie Durham (born 1940) is an American-born sculptor, essayist and poet, living and working in Europe since 1994.  He was active in the United States in the civil rights movements of African Americans and Native Americans in the 1960s and 1970s, serving on the central council of the American Indian Movement (AIM).  He returned to working at art while living in New York City.  His work has been extensively exhibited.

Trouble Maker (duo): Trouble Maker () is a duo formed by Cube Entertainment in 2011, composed of Kim HyunA and Jang Hyun-seung.

Jang Hyun-seung: Jang Hyun-seung (; born September 3, 1989) most often credited as Hyunseung, is a South Korean singer.  He is best known as a former member of the boy group Beast, under the label Cube Entertainment.  With Beast, he has released singles and albums in both Korean and Japanese.  Beast won the Artist of the Year (Daesang) award at the Melon Music Awards in 2011.

Full Circle (Jimmie Ross album): Full Circle is the debut album of Pittsburgh rock/pop musician Jimmie Ross, best known as a member of the Jaggerz.  The album, released in 2010, contains the best of his songs from the Jaggerz.

1981 IPSC Handgun World Shoot: The 1981 IPSC Handgun World Shoot V held in Johannesburg, South Africa, was the 5th Handgun World Shoot, and was won by Ross Seyfried of United States, using a relatively stock firearm compared to the highly tuned firearms of many other shooters.  Well known in the U.S., Ross had previously won the 1978 U.S. National Championship, and was member of the US National Team who placed second in the previous 1979 World Shoot.  The 1981 championship showed the Americans return with a vengeance when both Ross Seyfried took the individual World Title and the US National Team took gold in the team classification.

Ross Powers: Ross Powers (born February 10, 1979) is an American world champion halfpipe snowboarder from South Londonderry, Vermont.  Though he originally rode at Stratton Mountain, Vermont, his home mountain is now Okemo, VT.  Ross helps with the design of the Superpipe and also helped design the RossCross Family Terrain Park.  Ross also runs a snowboard camp through Okemo.  He led the U.S. sweep in the 2002 Winter Olympics men's halfpipe competition, one day after his 23rd birthday.  This is the first time the Americans have swept a Winter Olympic event since the men's figure skaters did in 1956.  Powers, with a score of 46.1, dominated the competition.

Supporting paragraphs: Jimmie Ross Jang Hyun-seung
Answer: no