Question: Rachel Carson and Walter Mosley, are which nationality?

Context paragraphs:
RV Rachel Carson (2008): RV "Rachel Carson" is a research vessel owned and operated by the University of Maryland's Center for Environmental Science, named in honor of the marine biologist and writer Rachel Carson.

Walter T. Mosley: Walter T. Mosley (born Walter Mosley III in Brooklyn, New York) is an American Democratic politician that represents the 57th district of the New York State Assembly.  He serves the neighborhoods of Fort Greene, Clinton Hill, Prospect Heights, and parts of Crown Heights and Bedford Stuyvesant.

Rachel Carson National Wildlife Refuge: The Rachel Carson National Wildlife Refuge is a 9125 acre National Wildlife Refuge made up of several parcels of land along 50 mi of Maine's southern coast.  Created in 1966, it is named for environmentalist and author Rachel Carson, whose book "Silent Spring" raised public awareness of the effects of DDT on migratory songbirds, and of other environmental issues.

Walter Mosley: Walter Ellis Mosley (born January 12, 1952) is an American novelist, most widely recognized for his crime fiction.  He has written a series of best-selling historical mysteries featuring the hard-boiled detective Easy Rawlins, a black private investigator and World War II veteran living in the Watts neighborhood of Los Angeles; they are perhaps his most popular works.

Rachel Carson Prize: Rachel Carson Prize may refer to any of three prizes and awards named after environmentalist Rachel Carson:

Ruth Jury Scott: Ruth Jury Scott (27 March 1909 – 18 June 2003) was a lifelong environmental activist, naturalist, and conservationist.  Scott was a close friend and colleague to Rachel Carson due to their shared passion for educating others about the environment as well as the deadly effects of chemical pesticides.  She later served on the executive committee of the Rachel Carson Trust for the Living Environment, Inc.

Rachel Carson Prize (environmentalist award): The Rachel Carson Prize ("Rachel Carson-prisen") is an international environmental award, established in Stavanger, Norway in 1991 to commemorate the achievements of environmentalist Rachel Carson and to award efforts in her spirit.  The prize is awarded to a woman who has distinguished herself in outstanding work for the environment in Norway or internationally.

Rachel Carson: Rachel Louise Carson (May 27, 1907 – April 14, 1964) was an American marine biologist, author, and conservationist whose book "Silent Spring" and other writings are credited with advancing the global environmental movement.

Rachel Carson Run: Rachel Carson Run is a 1.4 mi long tributary of the Allegheny River located in Allegheny County in the U.S. state of Pennsylvania.  The stream is named after ecologist Rachel Carson.

Rachel Carson House (Colesville, Maryland): The Rachel Carson House is a historic house at 11701 Berwick Road in Colesville, Maryland, an unincorporated area near Silver Spring, Maryland.  Built in 1956, this typical suburban ranch-style house was where writer Rachel Carson wrote her classic work "Silent Spring" in 1962.  The house was designated a National Historic Landmark in 1991 for its association with Carson.

Supporting paragraphs: Rachel Carson Walter Mosley
Answer: American