The Constitution of Alberta describes the fundamental rules under which the Canadian province of Alberta is governed.
 As is typical of all Canadian provinces, and Westminster systems more generally, Alberta's is an unwritten constitution.
 Alberta's constitution, like Britain's (on which it is modeled), includes any and all pieces of legislation, court decisions, proclamations, and conventions which together inform how the province operates.
 Many statutes are important to understanding the governance of the province, but nowhere are they consolidated into a single document or even a list.
 The office of Attorney-General at one time suggested 23 acts which might be included, but cautioned that this was not a "definitive list".
 However, since Alberta is a part of federation, its powers are clearly delineated in law, via the Constitution of Canada.
The Constitution of the Kingdom of Westphalia, was adopted by the Kingdom of Westphalia in 1807, following the pattern of the other Napoleonic States.
 The Constitution of the Kingdom of Westphalia is the oldest constitution in Germany.
 It was modeled on the constitutions of other Napoleonic States (e.g., the highest organization of the patent Constitution of the Grand Duchy of Frankfurt).
 The Constitution was by royal decree dated on 7 December 1807 and enacted in law bulletin.
The Constitution of Liberia is the supreme law of the Republic of Liberia.
 The current constitution, which came into force on 6 January 1986, replaced the Liberian Constitution of 1847, which had been in force since the independence of Liberia.
 Much like the 1847 Constitution, the Constitution creates a system of government heavily modeled on the Federal Government of the United States.
By the arrangements of the Canadian federation, Canada's monarchy operates in Alberta as the core of the province's Westminster-style parliamentary democracy.
 As such, the Crown within Alberta's jurisdiction is referred to as "the Crown in Right of Alberta", "Her Majesty in Right of Alberta", or "The Queen in Right of Alberta".
 The Constitution Act, 1867, however, leaves many royal duties in Alberta specifically assigned to the sovereign's viceroy, the Lieutenant Governor of Alberta, whose direct participation in governance is limited by the conventional stipulations of constitutional monarchy.
FooDB (The Food Database) is a freely available, open-access database containing chemical (micronutrient and macronutrient) composition data on common, unprocessed foods.
 It also contains extensive data on flavour and aroma constituents, food additives as well as positive and negative health effects associated with food constituents.
 The database contains information on more than 28,000 chemicals found in more than 1000 raw or unprocessed food products.
 The data in FooDB was collected from many sources including textbooks, scientific journals, on-line food composition or nutrient databases, flavour and aroma databases and various on-line metabolomic databases.
 This literature-derived information has been combined with experimentally derived data measured on thousands of compounds from more than 40 very common food products through the Alberta Food Metabolome Project which is led by Dr. David Wishart of the University of Alberta.
 Users are able to browse through the FooDB data by food source, name, descriptors or function.
 Chemical structures and molecular weights for compounds in FooDB may be searched via a specialized chemical structure search utility.
 Users are able to view the content of FooDB using two different “Viewing” options: FoodView, which lists foods by their chemical compounds, or ChemView, which lists chemicals by their food sources.
 Knowledge about the precise chemical composition of foods can be used to guide public health policies, assist food companies with improved food labelling, help dieticians prepare better dietary plans, support nutraceutical companies with their submissions of health claims and guide consumer choices with regard to food purchases.
The Constitution of the Republic of Singapore is the supreme law of Singapore.
 A written constitution, the text which took effect on 9 August 1965 is derived from the Constitution of the State of Singapore 1963, provisions of the Federal Constitution of Malaysia made applicable to Singapore by the Republic of Singapore Independence Act 1965 (No. 9 of 1965, 1985 Rev. Ed.
) , and the Republic of Singapore Independence Act itself.
 The text of the Constitution is one of the legally binding sources of constitutional law in Singapore, the others being judicial interpretations of the Constitution, and certain other statutes.
 Non-binding sources are influences on constitutional law such as soft law, constitutional conventions, and public international law.
The documentary hypothesis (DH) is one of three models used to explain the origins and composition of the first five books of the Bible, called collectively the Torah or Pentateuch, the other two being the supplementary hypothesis and the fragmentary hypothesis.
 All three agree that the Torah is not a unified work from a single author (traditionally Moses) but is made up of sources combined over many centuries by many hands.
 They differ on the nature of these sources and how they were combined.
 According to the documentary hypothesis there were four sources, each originally a separate and independent book (a "document"), joined together at various points in time by a series of editors ("redactors").
 Fragmentary hypotheses see the Torah as a collection of small fragments, and supplementary hypotheses as a single core document supplemented by fragments taken from many sources.
The architecture of Iceland draws from Scandinavian influences and, traditionally, was influenced by the lack of native trees on the island.
 As a result, grass- and turf-covered houses were developed.
 Later on, the Swiss chalet style became a prevailing influence in Icelandic architecture as many timber buildings were constructed in this way.
 Stone and later concrete were popular building materials, the latter especially with the arrival of functionalism in the country.
 Contemporary architecture in Iceland is influenced by many sources, with styles varying greatly around the country.
The United Kingdom does not have one specific constitutional document named as such.
 Instead, the so called constitution of the United Kingdom is a sum of laws and principles that make up the body politic of the UK.
 This is sometimes referred to as an "unwritten" or uncodified constitution.
 The British constitution primarily draws from four sources: statute law (laws passed by the legislature), common law (laws established through court judgments), parliamentary conventions, and works of authority.
 Similar to a written constitution, this sum also concerns both the relationship between the individual and the state, and the functioning of the legislature, the executive and judiciary.
Fundamental Rights are the basic rights of the people and the charter of rights contained in of Constitution of India.
 It guarantees civil liberties such that all Indians can lead their lives in peace and harmony as citizens of India.
 These include individual rights common to most liberal democracies, such as equality before law, freedom of speech and expression, religious and cultural freedom and peaceful assembly, freedom to practice religion, and the right to constitutional remedies for the protection of civil rights by means of writs such as habeas corpus, Mandamus, Prohibition, Certiorariand Quo Warranto.
 Violation of these rights result in punishments as prescribed in the Indian Penal Code or other special laws, subject to discretion of the judiciary.
 The Fundamental Rights are defined as basic human freedoms that every Indian citizen has the right to enjoy for a proper and harmonious development of personality.
 These rights universally apply to all citizens, irrespective of race, place of birth, religion, caste or gender.
 Aliens (persons who are not citizens) are also considered in matters like equality before law.
 They are enforceable by the courts, subject to certain restrictions.
 Though the rights conferred by the constitution other than fundamental rights are equally valid, their enforcement in case of violation shall be secured from the judiciary in a time consuming legal process.
 However in case of fundamental rights violation, Supreme court of India can be approached directly for ultimate justice per .
 The Rights have their origins in many sources, including England's Bill of Rights, the United States Bill of Rights and France's Declaration of the Rights of Man.

Question: From how many sources does this constitution, on which the Constitution of Alberta is modeled, draws?
Answer: four sources