rajpurkar/squad huggingface dataset:
Title: Copper

The alloy of copper and nickel, called cupronickel, is used in low-denomination coins, often for the outer cladding. The US 5-cent coin called a nickel consists of 75% copper and 25% nickel and has a homogeneous composition. The alloy consisting of 90% copper and 10% nickel is remarkable for its resistance to corrosion and is used in various parts that are exposed to seawater. Alloys of copper with aluminium (about 7%) have a pleasant golden color and are used in decorations. Some lead-free solders consist of tin alloyed with a small proportion of copper and other metals.

Question: What is the alloy of copper and nickel called?
Answer: cupronickel

Question: what is the alloy of copper and nickel used for?
Answer: low-denomination coins

Question: What is the metal composition of a US nickel?
Answer: 75% copper and 25% nickel

Question: What extraordinary property does the alloy made up of 90% copper and 10% nickel possess?
Answer: resistance to corrosion

Question: What color is created when the alloys of copper and aluminium are combined?
Answer: golden
Title: Copper

Polyols, compounds containing more than one alcohol functional group, generally interact with cupric salts. For example, copper salts are used to test for reducing sugars. Specifically, using Benedict's reagent and Fehling's solution the presence of the sugar is signaled by a color change from blue Cu(II) to reddish copper(I) oxide. Schweizer's reagent and related complexes with ethylenediamine and other amines dissolve cellulose. Amino acids form very stable chelate complexes with copper(II). Many wet-chemical tests for copper ions exist, one involving potassium ferrocyanide, which gives a brown precipitate with copper(II) salts.

Question: What is the name of the componds that has more than one alcohol functional group?
Answer: Polyols

Question: What are copper salts used to test?
Answer: reducing sugars

Question: How is the presence of sugar shown by using Benedict's reagent and Fehling's solution?
Answer: color change

Question: What color does the copper salts turn to using Benedict's reagent and Fehling's solution if sugar is present?
Answer: reddish

Question: What does Schweizer's reagent dissolve?
Answer: cellulose
Title: Copper

Alloying copper with tin to make bronze was first practiced about 4000 years after the discovery of copper smelting, and about 2000 years after "natural bronze" had come into general use[citation needed]. Bronze artifacts from the Vinča culture date to 4500 BC. Sumerian and Egyptian artifacts of copper and bronze alloys date to 3000 BC. The Bronze Age began in Southeastern Europe around 3700–3300 BC, in Northwestern Europe about 2500 BC. It ended with the beginning of the Iron Age, 2000–1000 BC in the Near East, 600 BC in Northern Europe. The transition between the Neolithic period and the Bronze Age was formerly termed the Chalcolithic period (copper-stone), with copper tools being used with stone tools. This term has gradually fallen out of favor because in some parts of the world the Chalcolithic and Neolithic are coterminous at both ends. Brass, an alloy of copper and zinc, is of much more recent origin. It was known to the Greeks, but became a significant supplement to bronze during the Roman Empire.

Question: What started about 4000 years after copper smelting was discovered?
Answer: Alloying copper with tin to make bronze

Question: What are the first datings of Bronze artifacts from the Vinca culture?
Answer: 4500 BC

Question: When did the Bronze Age began in Southeastern Europe?
Answer: 3700–3300 BC

Question: What was the transition between the Neolithic period and the bronze age called?
Answer: Chalcolithic

Question: What is an alloy of copper and zinc?
Answer: Brass
Title: Copper

Copper is an essential trace element in plants and animals, but not some microorganisms. The human body contains copper at a level of about 1.4 to 2.1 mg per kg of body mass. Stated differently, the RDA for copper in normal healthy adults is quoted as 0.97 mg/day and as 3.0 mg/day. Copper is absorbed in the gut, then transported to the liver bound to albumin. After processing in the liver, copper is distributed to other tissues in a second phase. Copper transport here involves the protein ceruloplasmin, which carries the majority of copper in blood. Ceruloplasmin also carries copper that is excreted in milk, and is particularly well-absorbed as a copper source. Copper in the body normally undergoes enterohepatic circulation (about 5 mg a day, vs. about 1 mg per day absorbed in the diet and excreted from the body), and the body is able to excrete some excess copper, if needed, via bile, which carries some copper out of the liver that is not then reabsorbed by the intestine.

Question: What is the level of copper in the human body?
Answer: 1.4 to 2.1 mg per kg of body mass

Question: How is copper absorbed in humans?
Answer: in the gut

Question: What is copper bound with when it is sent to the liver?
Answer: albumin

Question: What protein carries the majority of copper in blood?
Answer: Ceruloplasmin

Question: How can the body get rid of excess copper?
Answer: via bile
Title: Copper

The concentration of copper in ores averages only 0.6%, and most commercial ores are sulfides, especially chalcopyrite (CuFeS2) and to a lesser extent chalcocite (Cu2S). These minerals are concentrated from crushed ores to the level of 10–15% copper by froth flotation or bioleaching. Heating this material with silica in flash smelting removes much of the iron as slag. The process exploits the greater ease of converting iron sulfides into its oxides, which in turn react with the silica to form the silicate slag, which floats on top of the heated mass. The resulting copper matte consisting of Cu2S is then roasted to convert all sulfides into oxides:

Question: What is the average concentration of copper in ores?
Answer: 0.6%

Question: What are most commercial ores?
Answer: sulfides

Question: What happens to the silicate slag  during the flash smelting process?
Answer: floats on top

Question: What does heating copper ore materials with silica remove?
Answer: iron

Question: What do the sulfides convert to after the copper matte is roasted?
Answer: oxides
Title: Copper

Together with caesium and gold (both yellow), and osmium (bluish), copper is one of only four elemental metals with a natural color other than gray or silver. Pure copper is orange-red and acquires a reddish tarnish when exposed to air. The characteristic color of copper results from the electronic transitions between the filled 3d and half-empty 4s atomic shells – the energy difference between these shells is such that it corresponds to orange light. The same mechanism accounts for the yellow color of gold and caesium.

Question: How many metals have a natural color that isn't gray?
Answer: four

Question: What color is pure copper?
Answer: orange-red

Question: What does copper aquire when exposed to air?
Answer: reddish tarnish

Question: The energy difference between filled 3d and half-empty 4s atomic shells corresponds to what color of light?
Answer: orange light

Question: What color is the metal caesium?
Answer: yellow
Title: Copper

Copper has been used since ancient times as a durable, corrosion resistant, and weatherproof architectural material. Roofs, flashings, rain gutters, downspouts, domes, spires, vaults, and doors have been made from copper for hundreds or thousands of years. Copper's architectural use has been expanded in modern times to include interior and exterior wall cladding, building expansion joints, radio frequency shielding, and antimicrobial indoor products, such as attractive handrails, bathroom fixtures, and counter tops. Some of copper's other important benefits as an architectural material include its low thermal movement, light weight, lightning protection, and its recyclability.

Question: What has copper been used for since ancient times?
Answer: architectural material

Question: In recent times what is one interior use copper been expanded to include?
Answer: antimicrobial indoor products

Question: What is an important benefit to using copper as an architectural material?
Answer: low thermal movement

Question: How long has copper been used in building construction?
Answer: hundreds or thousands of years

Question: What is the benefit to using copper for things such as counter tops and hand rails?
Answer: antimicrobial
Title: Identity_(social_science)

A psychological identity relates to self-image (one's mental model of oneself), self-esteem, and individuality. Consequently, Weinreich gives the definition "A person's identity is defined as the totality of one's self-construal, in which how one construes oneself in the present expresses the continuity between how one construes oneself as one was in the past and how one construes oneself as one aspires to be in the future"; this allows for definitions of aspects of identity, such as: "One's ethnic identity is defined as that part of the totality of one's self-construal made up of those dimensions that express the continuity between one's construal of past ancestry and one's future aspirations in relation to ethnicity" (Weinreich, 1986a).

Question: Self-image, self-esteem, and individuality relate to what?
Answer: A psychological identity

Question: What aspect or type of identity does Weinreich single out?
Answer: ethnic identity

Question: What psychological concept does Weinreich state as between the past and future?
Answer: identity

Question: A person's identity is defined as the totality of what?
Answer: one's self-construal
Title: Identity_(social_science)

The description or representation of individual and group identity is a central task for psychologists, sociologists and anthropologists and those of other disciplines where "identity" needs to be mapped and defined. How should one describe the identity of another, in ways which encompass both their idiosyncratic qualities and their group memberships or identifications, both of which can shift according to circumstance? Following on from the work of Kelly, Erikson, Tajfel and others Weinreich's Identity Structure Analysis (ISA), is "a structural representation of the individual's existential experience, in which the relationships between self and other agents are organised in relatively stable structures over time … with the emphasis on the socio-cultural milieu in which self relates to other agents and institutions" (Weinreich and Saunderson, (eds) 2003, p1). Using constructs drawn from the salient discourses of the individual, the group and cultural norms, the practical operationalisation of ISA provides a methodology that maps how these are used by the individual, applied across time and milieus by the "situated self" to appraise self and other agents and institutions (for example, resulting in the individual's evaluation of self and significant others and institutions).[citation needed]

Question: The central task for psychologists, sociologists, and anthropologists is to describe what topics?
Answer: individual and group identity

Question: Who developed the ISA?
Answer: Weinreich

Question: ISA stands for what?
Answer: Identity Structure Analysis
Title: Identity_(social_science)

Weinreich's identity variant similarly includes the categories of identity diffusion, foreclosure and crisis, but with a somewhat different emphasis. Here, with respect to identity diffusion for example, an optimal level is interpreted as the norm, as it is unrealistic to expect an individual to resolve all their conflicted identifications with others; therefore we should be alert to individuals with levels which are much higher or lower than the norm – highly diffused individuals are classified as diffused, and those with low levels as foreclosed or defensive. (Weinreich & Saunderson, 2003, pp 65–67; 105-106). Weinreich applies the identity variant in a framework which also allows for the transition from one to another by way of biographical experiences and resolution of conflicted identifications situated in various contexts – for example, an adolescent going through family break-up may be in one state, whereas later in a stable marriage with a secure professional role may be in another. Hence, though there is continuity, there is also development and change. (Weinreich & Saunderson, 2003, pp 22–23).

Question: Identity diffusion, foreclosure, and crisis are categories of what?
Answer: Weinreich's identity variant

Question: Those with high levels of identity diffusion are classified as what?
Answer: diffused

Question: Those with low levels of identity diffusion are classified as what?
Answer: foreclosed or defensive

Question: An adolescent going through a family break up turning into an adult in a stable marriage is given as an example of change in what?
Answer: the identity variant

Question: What level of identity diffusion is interpreted as the norm?
Answer: an optimal level
Title: Identity_(social_science)

Anthropologists have contributed to the debate by shifting the focus of research: One of the first challenges for the researcher wishing to carry out empirical research in this area is to identify an appropriate analytical tool. The concept of boundaries is useful here for demonstrating how identity works. In the same way as Barth, in his approach to ethnicity, advocated the critical focus for investigation as being "the ethnic boundary that defines the group rather than the cultural stuff that it encloses" (1969:15), social anthropologists such as Cohen and Bray have shifted the focus of analytical study from identity to the boundaries that are used for purposes of identification. If identity is a kind of virtual site in which the dynamic processes and markers used for identification are made apparent, boundaries provide the framework on which this virtual site is built. They concentrated on how the idea of community belonging is differently constructed by individual members and how individuals within the group conceive ethnic boundaries.

Question: What group has shifted the focus of research in identity?
Answer: Anthropologists

Question: What does a researcher have to identify to carry out empirical research?
Answer: an appropriate analytical tool

Question: What researcher advocated for focus on the boundaries of ethnic groups rather than the cultural aspects of ethnic groups?
Answer: Barth

Question: If identity is a virtual site, what do boundaries supply to the virtual site?
Answer: the framework

Question: Boundaries are frequently used by researchers to help define what?
Answer: identity
Title: Identity_(social_science)

The inclusiveness of Weinreich's definition (above) directs attention to the totality of one's identity at a given phase in time, and assists in elucidating component aspects of one's total identity, such as one's gender identity, ethnic identity, occupational identity and so on. The definition readily applies to the young child, to the adolescent, to the young adult, and to the older adult in various phases of the life cycle. Depending on whether one is a young child or an adult at the height of one's powers, how one construes oneself as one was in the past will refer to very different salient experiential markers. Likewise, how one construes oneself as one aspires to be in the future will differ considerably according to one's age and accumulated experiences. (Weinreich & Saunderson, (eds) 2003, pp 26–34).

Question: What are gender identity, ethnic identity, and occupational identity aspects of?
Answer: one's total identity

Question: How one construes oneself now and in the future differs considerably because of what 2 things?
Answer: age and accumulated experiences

Question: The young child, the adolescent, the young adult and the older adult are phases of what?
Answer: the life cycle

Question: The salient experiential markers one uses to define one's past self differ based on the age that one was at what?
Answer: the height of one's powers
Title: Identity_(social_science)

Although the self is distinct from identity, the literature of self-psychology can offer some insight into how identity is maintained (Cote & Levin 2002, p. 24). From the vantage point of self-psychology, there are two areas of interest: the processes by which a self is formed (the "I"), and the actual content of the schemata which compose the self-concept (the "Me"). In the latter field, theorists have shown interest in relating the self-concept to self-esteem, the differences between complex and simple ways of organizing self-knowledge, and the links between those organizing principles and the processing of information (Cote & Levin 2002).

Question: What is distinct from the self?
Answer: identity

Question: What can the literature of self-psychology offer insight into?
Answer: how identity is maintained

Question: What have theorists shown interest in relating to the self-concept?
Answer: self-esteem

Question: The I and the Me are two areas of interest in what?
Answer: self-psychology
Title: Identity_(social_science)

At a general level, self-psychology is compelled to investigate the question of how the personal self relates to the social environment. To the extent that these theories place themselves in the tradition of "psychological" social psychology, they focus on explaining an individual's actions within a group in terms of mental events and states. However, some "sociological" social psychology theories go further by attempting to deal with the issue of identity at both the levels of individual cognition and of collective behavior.

Question: Self-psychology is compelled to investigate how personal self relates to what?
Answer: the social environment

Question: What two factors are focused on when explaining an individual's actions within a group?
Answer: mental events and states

Question: What are individual cognition and collective behavior are levels of?
Answer: identity
Title: Identity_(social_science)

Anthropologists have most frequently employed the term 'identity' to refer to this idea of selfhood in a loosely Eriksonian way (Erikson 1972) properties based on the uniqueness and individuality which makes a person distinct from others. Identity became of more interest to anthropologists with the emergence of modern concerns with ethnicity and social movements in the 1970s. This was reinforced by an appreciation, following the trend in sociological thought, of the manner in which the individual is affected by and contributes to the overall social context. At the same time, the Eriksonian approach to identity remained in force, with the result that identity has continued until recently to be used in a largely socio-historical way to refer to qualities of sameness in relation to a person's connection to others and to a particular group of people.

Question: What term have Anthropologists employed to refer to the Eriksonian idea of selfhood?
Answer: identity

Question: Modern concerns with ethnicity and social movements in the 1970's led what group to be more interested in identity?
Answer: anthropologists

Question: Until recently, what approach was used to refer to qualities of sameness in relation to a person's connection to others?
Answer: the Eriksonian approach
Title: Identity_(social_science)

Boundaries can be inclusive or exclusive depending on how they are perceived by other people. An exclusive boundary arises, for example, when a person adopts a marker that imposes restrictions on the behaviour of others. An inclusive boundary is created, by contrast, by the use of a marker with which other people are ready and able to associate. At the same time, however, an inclusive boundary will also impose restrictions on the people it has included by limiting their inclusion within other boundaries. An example of this is the use of a particular language by a newcomer in a room full of people speaking various languages. Some people may understand the language used by this person while others may not. Those who do not understand it might take the newcomer's use of this particular language merely as a neutral sign of identity. But they might also perceive it as imposing an exclusive boundary that is meant to mark them off from her. On the other hand, those who do understand the newcomer's language could take it as an inclusive boundary, through which the newcomer associates herself with them to the exclusion of the other people present. Equally, however, it is possible that people who do understand the newcomer but who also speak another language may not want to speak the newcomer's language and so see her marker as an imposition and a negative boundary. It is possible that the newcomer is either aware or unaware of this, depending on whether she herself knows other languages or is conscious of the plurilingual quality of the people there and is respectful of it or not.

Question: What are the two types of group boundaries?
Answer: inclusive or exclusive

Question: A marker that imposes restriction on the behavior of others is what kind of boundary?
Answer: exclusive

Question: A marker that people are ready and willing to associate with is what kind of boundary?
Answer: inclusive

Question: What boundary is given as an example that can be inclusive or exclusive?
Answer: language
Title: Identity_(social_science)

The "Neo-Eriksonian" identity status paradigm emerged in later years[when?], driven largely by the work of James Marcia. This paradigm focuses upon the twin concepts of exploration and commitment. The central idea is that any individual's sense of identity is determined in large part by the explorations and commitments that he or she makes regarding certain personal and social traits. It follows that the core of the research in this paradigm investigates the degrees to which a person has made certain explorations, and the degree to which he or she displays a commitment to those explorations.

Question: What identity status paradigm emerged due to the work of James Marcia?
Answer: Neo-Eriksonian

Question: The Neo-Eriksonian identity status paradigm focuses on what twin concepts?
Answer: exploration and commitment

Question: In the Neo-Eriksonian identity status paradigm, exploration and commitments determine what in large part?
Answer: any individual's sense of identity
Title: Identity_(social_science)

Many people gain a sense of positive self-esteem from their identity groups, which furthers a sense of community and belonging. Another issue that researchers have attempted to address is the question of why people engage in discrimination, i.e., why they tend to favor those they consider a part of their "in-group" over those considered to be outsiders. Both questions have been given extensive attention by researchers working in the social identity tradition. For example, in work relating to social identity theory it has been shown that merely crafting cognitive distinction between in- and out-groups can lead to subtle effects on people's evaluations of others (Cote & Levine 2002).

Question: What do many people gain from their identity groups?
Answer: a sense of positive self-esteem

Question: People favoring those in their group over outsiders, is an example of what?
Answer: discrimination

Question: Belonging and discrimination are both important to researchers working in what tradition?
Answer: the social identity tradition

Question: Distinction between in and out groups has been shown to affect people's evaluations of others in work related to what?
Answer: social identity theory