Question: What is the nationality of the person who researched "Underground"?

Context articles: Israeli nationality law
British protected person
Underground (Dreyfus book)
List of countries by refugee population
Julian Assange
Nationality law
Brazilian nationality law
Venezuelan nationality law
Nationality
Multiple citizenship

Israeli nationality law defines the criteria under which a person can be granted citizenship of Israel.
 It also deals with the Right of Return for Jewish diaspora.
 In general, Israel's nationality follows jus sanguinis as the primary mechanism through which a person may obtain citizenship, rather than jus soli.
 A citizen of the modern state of Israel is called an Israeli.
A British protected person (BPP) is a member of a class of certain persons under the British Nationality Act 1981 associated with former protected states, protectorates, mandated and trust territories under British control.
 The inhabitants of these former states or territories were never automatically entitled because of their birthplace to become British subjects or citizens, but were given the status of British protected person instead.
 (A few of those born in such areas might have other claims to British nationality; for example, one based on the status of their parents.)
Underground: Tales of Hacking, Madness and Obsession on the Electronic Frontier is a 1997 book by Suelette Dreyfus, researched by Julian Assange.
 It describes the exploits of a group of Australian, American, and British black hat hackers during the late 1980s and early 1990s, among them Assange himself.
Under international law, a refugee is a person who has fled his or her own country of nationality or habitual residence, and cannot return due to fear of persecution on account of his or her race, religion, nationality, membership in a particular social group, or political opinion, and is unable or unwilling to avail themself of the protection of that country, or to return there, for fear of persecution.
 These recent migration movements are caused by a variety of reasons.
 Some of the refugees stay in refugee camps, some are urban refugees in individual accommodations, some stay in self-settled camps and for some refugees the location is undefined or unknown by UNHCR.
Julian Paul Assange ( ; born Julian Paul Hawkins, 3 July 1971) is an Australian computer programmer and the founder of WikiLeaks, an organisation which he founded in 2006.
 He has won accolades including the Sam Adams Award and Martha Gellhorn Prize for Journalism.
Nationality law (or citizenship law) is the law in each country and in each jurisdiction within each country which defines the rights and obligations of citizenship within the jurisdiction and the manner in which citizenship is acquired as well as how citizenship may be lost.
 A person who is not a citizen of the country is generally regarded as a foreigner, also referred to as an alien.
 A person who has no recognised nationality or citizenship is regarded as stateless.
Brazilian nationality law is based on both the principles of "jus soli" and of "jus sanguinis".
 As a general rule, any person born in Brazil acquires Brazilian nationality at birth, irrespective of status of parents.
 Nationality law is regulated by Article 12 of the Brazilian Federal Constitution.
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 .
Nationality is a legal relationship between an individual person and a state.
 Nationality affords the state jurisdiction over the person and affords the person the protection of the state.
 What these rights and duties are vary from state to state.
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.