Question: What is the nationality of the person who wrote "The Universal Solvent"?

Context paragraphs:
Azoth: Azoth was considered to be a universal medication or universal solvent sought in alchemy.  Similar to another alchemical idealized substance, alkahest, azoth was the aim, goal and vision of many alchemical works.  Its symbol was the Caduceus.  The term, while originally a term for an occult formula sought by alchemists much like the philosopher's stone, became a poetic word for the element mercury.  The name is Medieval Latin, an alteration of "azoc", being originally derived from the Arabic "al-zā'būq", "the mercury".

Venezuelan nationality law: Venezuelan nationality law is based on the principle of Jus soli.  Any person born in Venezuela acquires Venezuelan citizenship at birth, irrespective of nationality or status of parents.  Nationality law is regulated by Section 1 of Chapter 2 of the Constitution of Venezuela and by the Nationality and Citizenship Act of 2004 .

Don Rosa: Keno Don Hugo Rosa ( ), known simply as Don Rosa (born June 29, 1951), is an American comic book author and illustrator known for his stories about Scrooge McDuck, Donald Duck and other Disney characters.  Many of his stories are built on characters and locations created by Carl Barks, including the story that brought him to fame as a modern Disney artist – the Harvey Award-nominated comic, "The Son of the Sun".

Alkahest: Alkahest is a hypothetical universal solvent, having the power to dissolve every other substance, including gold.  It was much sought after by alchemists for what they thought would be its invaluable medicinal qualities.

Multiple citizenship: Multiple citizenship, also called dual citizenship or multiple nationality or dual nationality, is a person's citizenship status, in which a person is concurrently regarded as a citizen of more than one state under the laws of those states.  There is no international convention which determines the nationality or citizen status of a person, which is defined exclusively by national laws, which vary and can be inconsistent with each other.  Multiple citizenship arises because different countries use different, and not necessarily mutually exclusive, criteria for citizenship.  Colloquial speech refers to people "holding" multiple citizenship but technically each nation makes a claim that this person be considered its national.

Properties of water: Water (H2O ) is a polar inorganic compound that is at room temperature a tasteless and odorless liquid, nearly colorless with a hint of blue.  This simplest hydrogen chalcogenide is by far the most studied chemical compound and is described as the "universal solvent" for its ability to dissolve many substances.  This allows it to be the "solvent of life".  It is the only common substance to exist as a solid, liquid, and gas on Earth's surface.

Alchemy: Alchemy is a philosophical and protoscientific tradition practiced throughout Europe, Africa and Asia.  It aimed to purify, mature, and perfect certain objects.  Common aims were chrysopoeia, the transmutation of "base metals" (e.g., lead) into "noble metals" (particularly gold); the creation of an elixir of immortality; the creation of panaceas able to cure any disease; and the development of an alkahest, a universal solvent.  The perfection of the human body and soul was thought to permit or result from the alchemical magnum opus and, in the Hellenistic and western tradition, the achievement of gnosis.  In Europe, the creation of a philosopher's stone was variously connected with all of these projects.

Cash Flow (comics): Cash Flow is an Uncle Scrooge-adventure comic written and drawn by Don Rosa from 1987 and first of his stories where the Beagle Boys appeared.  Like some others comic stories by Don Rosa (such as "A Matter of Some Gravity" and "The Universal Solvent") that story is founded in toying with laws of nature.  Rosa thinks that he has got ideas for those comics from mechanical engineering course of institute of higher education, which he took before he became to professional cartoonist.

A Matter of Some Gravity: A Matter of Some Gravity is an Uncle Scrooge adventure comic written and drawn by Don Rosa in 1996 and includes Magica De Spell.  Like some other comic stories by Rosa ("Cash Flow" and "The Universal Solvent"), the story is founded with toying with the laws of nature.  Rosa claims that he thinks that he got the ideas for those comics from a mechanical engineering course in an institute of higher education, which he took before he became a professional cartoonist.

The Universal Solvent (comics): "The Universal Solvent" is a 1995 Donald Duck story by Don Rosa.  The story was inspired by the novel "A Journey to the Center of the Earth" and was based on a "Pertwillaby Papers" adventure titled "Vortex".  It was also likely a partial sequel of the classic Carl Barks story, "Land Beneath the Ground! ".  Don Rosa wrote two sequels to this story, called "The Black Knight" and "The Black Knight Glorps Again".

Supporting paragraphs: The Universal Solvent (comics) Don Rosa
Answer: American