[Q]: Information: - Quantity is a property that can exist as a magnitude or multitude. Quantities can be compared in terms of "more", "less", or "equal", or by assigning a numerical value in terms of a unit of measurement. Quantity is among the basic classes of things along with quality, substance, change, and relation. Some quantities are such by their inner nature (as number), while others are functioning as states (properties, dimensions, attributes) of things such as heavy and light, long and short, broad and narrow, small and great, or much and little. A small quantity is sometimes referred to as a quantulum. - A definition is a statement of the meaning of a term (a word, phrase, or other set of symbols). Definitions can be classified into two large categories, intensional definitions (which try to give the essence of a term) and extensional definitions (which proceed by listing the objects that a term describes). Another important category of definitions is the class of ostensive definitions, which convey the meaning of a term by pointing out examples. A term may have many different senses and multiple meanings, and thus require multiple definitions. - Mathematics (from Greek "mathma", knowledge, study, learning) is the study of topics such as quantity (numbers), structure, space, and change. There is a range of views among mathematicians and philosophers as to the exact scope and definition of mathematics. - Mathematical logic is a subfield of mathematics exploring the applications of formal logic to mathematics. It bears close connections to metamathematics, the foundations of mathematics, and theoretical computer science. The unifying themes in mathematical logic include the study of the expressive power of formal systems and the deductive power of formal proof systems. Mathematical logic is often divided into the fields of set theory, model theory, recursion theory, and proof theory. These areas share basic results on logic, particularly first-order logic, and definability. In computer science (particularly in the ACM Classification) mathematical logic encompasses additional topics not detailed in this article; see Logic in computer science for those. - Space is the boundless three-dimensional extent in which objects and events have relative position and direction. Physical space is often conceived in three linear dimensions, although modern physicists usually consider it, with time, to be part of a boundless four-dimensional continuum known as spacetime. The concept of space is considered to be of fundamental importance to an understanding of the physical universe. However, disagreement continues between philosophers over whether it is itself an entity, a relationship between entities, or part of a conceptual framework. - Set theory is a branch of mathematical logic that studies sets, which informally are collections of objects. Although any type of object can be collected into a set, set theory is applied most often to objects that are relevant to mathematics. The language of set theory can be used in the definitions of nearly all mathematical objects. - In set theory and related branches of mathematics , a collection F of subsets of a given set S is called a family of subsets of S , or a family of sets over S. More generally , a collection of any sets whatsoever is called a family of sets . The term '' collection '' is used here because , in some contexts , a family of sets may be allowed to contain repeated copies of any given member , and in other contexts it may form a proper class rather than a set . - A mathematical object is an abstract object arising in mathematics. The concept is studied in philosophy of mathematics. What is the relationship between 'family of sets' and 'mathematical object'?
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[A]: subclass of
Problem: Information: - The Socialistiska Partiet ( English : Socialist Party ) is a Swedish Trotskyist political party , the Swedish section of the Fourth International . The party was formed at a congress in 1971 , through the merger of the Revolutionary Marxists ( RM ) and the Bolshevik Group ( BG ) . Initially it was called League of Revolutionary Marxists ( Swedish : Revolutionara Marxisters Forbund , RMF ) . One section of RM did not agree with the formation of RM , and formed the Communist Working Groups ( KAG ) . KAG would later reconcile with RMF , and merged into it in 1972 . At the 5th party congress , held in 1975 , the name was changed to Communist Workers League ( Kommunistiska Arbetarforbundet ) . In 1982 the party adopted its current name . In the early 1990s , the party suffered a small split that went on to form the Swedish section of the Pathfinder tendency . In 1994 , a smaller group left the SP to form a Swedish section of what is now the League for the Fifth International , Arbetarmakt . The party publishes the weekly paper Internationalen . The party is currently not represented in local authorities . - Communist Working Groups (in Swedish: "Kommunistiska Arbetsgrupperna") was a political organization in Sweden. KAG was formed in January 1971, at the time of the merger of the Bolshevik Group and the Revolutionary Marxists (RM) into the League of Revolutionary Marxists (RMF). The founders of KAG wanted a less well-knit group than RMF. KAG was based in Stockholm and Gothenburg. In Goteborg the majority of RM, led by Gote Kilden, had joined KAG. - An election is a formal decision-making process by which a population chooses an individual to hold public office. Elections have been the usual mechanism by which modern representative democracy has operated since the 17th century. Elections may fill offices in the legislature, sometimes in the executive and judiciary, and for regional and local government. This process is also used in many other private and business organizations, from clubs to voluntary associations and corporations. - A political party is a group of people who come together to contest elections and hold power in the government. The party agrees on some proposed policies and programmes, with a view to promoting the collective good or furthering their supporters' interests. - Stockholm (or ) is the capital of Sweden and the most populous city in the Nordic countries; 932,917 people live in the municipality, approximately 1.5 million in the urban area, and 2.3 million in the metropolitan area. The city is spread across 14 islands on the coast in the southeast of Sweden at the mouth of Lake Malaren, by the Stockholm archipelago and the Baltic Sea. The area has been settled since the Stone Age, in the 6th millennium BC, and was founded as a city in 1252 by a Swedish statesman Birger Jarl. It is also the capital of Stockholm County. - Gothenburg is the second-largest city in Sweden and the fifth-largest in the Nordic countries. Situated by the Kattegat, on the west coast of Sweden, the city has a population of approximately 550,000 in the urban area and 990,000 inhabitants in the metropolitan area. - Sweden, officially the Kingdom of Sweden (Swedish: ), is a Scandinavian country in Northern Europe. It borders Norway to the west and Finland to the east, and is connected to Denmark in the southwest by a bridge-tunnel across the Oresund. At , Sweden is the third-largest country in the European Union by area, with a total population of 10.0 million. Sweden consequently has a low population density of , with the highest concentration in the southern half of the country. Approximately 85% of the population lives in urban areas. What is the relationship between 'socialist party ' and 'organization'?

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instance of