Question:  Italy in a Day and Up Series are two examples of what?

Context articles: Heinkel HD 23
Analgesic adjuvant
Italy in a Day
Dehn plane
Siddeley-Deasy Sinaia
Heinkel HE 3
Up Series
Bede BD-10
Phosphazene
Yetholm-type shield

The Heinkel HD 23 was a carrier-borne fighter biplane designed in Germany at Heinkel Flugzeugwerke in the 1920s, for export to Japan.
 Two examples were delivered to Aichi as pattern aircraft in 1927.
 Aichi added rudimentary flotation capability and built two further examples as the Type H Carrier Fighter, but full-scale production was not started.
An analgesic adjuvant is a medication that is typically used for indications other than pain control but provides control of pain in some painful diseases. Anti-emetics and medication to relieve constipation are two examples of non-adjuvant medication indications because these are used to treat side effects and adverse effects.
 Examples include:
Italy in a Day - Un giorno da italiani is a 2014 Italian-British documentary film directed by Gabriele Salvatores.
 It was part of the Out of Competition section at the 71st Venice International Film Festival.
In geometry, Dehn introduced two examples of planes, a semi-Euclidean geometry and a non-Legendrian geometry, that have infinitely many lines parallel to a given one that pass through a given point, but where the sum of the angles of a triangle is at least π.
 A similar phenomenon occurs in hyperbolic geometry, except that the sum of the angles of a triangle is less than π.
 Dehn's examples use a non-Archimedean field, so that the Archimedean axiom is violated.
 They were introduced by and discussed by .
The Siddeley Deasy Sinaia, also known as the Armstrong Whitworth Sinaia was a twin-engined biplane day bomber with gunners in rearwards extensions of the engine nacelles.
 Two examples were ordered by the Air Ministry but only one was completed.
The Heinkel HE 3 was a sports aircraft built in Germany in the early 1920s.
 It was a conventional, low-wing monoplane with seating for three people in two tandem cockpits.
 The wing was a cantilever design, an unusual and advanced feature for the day.
 The fixed undercarriage was designed to be quickly changed from wheeled tailskid type to twin pontoons for operation as a seaplane.
 A HE 3 won first prize in its class at the 1923 aero meet at Gothenburg, and was subsequently selected as a trainer by the Swedish Navy, which bought two examples.
 In Swedish service, the aircraft gained the nickname "Paddan" ("Toad").
The "Up" Series is a series of documentary films produced by Granada Television that have followed the lives of fourteen British children since 1964, when they were seven years old.
 So far the documentary has had eight episodes spanning 49 years (one episode every seven years) and the documentary has been broadcast on both ITV and BBC.
 In a 2005 Channel 4 programme, the series topped the list of "The 50 Greatest Documentaries."
 The children were selected to represent the range of socio-economic backgrounds in Britain at that time, with the explicit assumption that each child's social class predetermines their future.
 Every seven years, the director, Michael Apted, films material from those of the fourteen who choose to participate.
 The aim of the series is stated at the beginning of "7 Up" as: "Why do we bring these children together?
 Because we want to get a glimpse of England in the year 2000.
 The shop steward and the executive of the year 2000 are now seven years old."
The Bede BD-10 was Jim Bede's attempt to introduce the world's first kit-built jet-powered general aviation supersonic aircraft.
 After several years of testing and modifications, the project was taken over by investors in order to produce fully completed civilian and military training aircraft, but these projects were never realized.
 Five examples were built in total and three of these crashed.
 Only two examples remain, both unflyable.
Phosphazenes are a class of chemical compounds in which a phosphorus atom is covalently linked to a nitrogen atom by a double bond and to three other atoms or radicals by single bonds.
 While other substitutions produce relatively persistent compounds, in organic synthesis the term largely refers to species with three amino substituents bound to phosphorus.
 The compounds are unusually stable examples of the phosphorane class of molecules and have a remarkable proton affinity.
 As such, they are one of the eminent examples of neutral, organic superbases. Two examples are hexachlorocyclotriphosphazene and bis(triphenylphosphine)iminium chloride.
 Phosphazenes are also known as iminophosphoranes and phosphine imides.
The Yetholm-type shield is a distinctive type of shield dating from 1200-800 BC (Bronze Age).
 The known shields come from Britain and Ireland, excepting one from Denmark.
 Their modern name comes from Yetholm in southern Scotland where a peat bog yielded three examples.
 Twenty two examples are known, although some of these are fragmentary, and a further seven or eight are known from written sources but are lost today.
 The shields vary significantly in size, but are otherwise similar.