Here's a short story:

In biology, kingdom (Latin: regnum, plural regna) is the second highest taxonomic rank, just below domain. Kingdoms are divided into smaller groups called phyla. Traditionally, some textbooks from the United States used a system of six kingdoms (Animalia, Plantae, Fungi, Protista, Archaea/Archaeabacteria, and Bacteria/Eubacteria) while textbooks in Great Britain, India, Australia, Latin America and other countries used five kingdoms (Animalia, Plantae, Fungi, Protista and Monera). Some recent classifications based on modern cladistics have explicitly abandoned the term "kingdom", noting that the traditional kingdoms are not monophyletic, i.e., do not consist of all the descendants of a common ancestor. 

When Carolus Linnaeus introduced the rank-based system of nomenclature into biology in 1735, the highest rank was given the name "kingdom" and was followed by four other main or principal ranks: class, order, genus and species. Later two further main ranks were introduced, making the sequence kingdom, phylum or division, class, order, family, genus and species. In the 1960s a rank was introduced above kingdom, namely domain (or empire), so that kingdom is no longer the highest rank. 

Prefixes can be added so "subkingdom" ("subregnum") and "infrakingdom" (also known as "infraregnum") are the two ranks immediately below kingdom. Superkingdom may be considered as an equivalent of domain or empire or as an independent rank between kingdom and domain or subdomain. In some classification systems the additional rank "branch" (Latin: "ramus") can be inserted between subkingdom and infrakingdom (e.g. Protostomia and Deuterostomia in the classification of Cavalier-Smith). (End of story)

Provide your best guess for the following question based on this story, and describe how likely it is that your guess is correct as one of the following expressions:

Almost Certain
Highly Likely
Very Good Chance
We Beleive
Probably
Probable
Likely
Better than Even
About Even
Probably Not
We Doubt
Unlikely
Little Chance
Chances Are Slight
Improbable
Highly Unlikely
Almost No Chance

Give ONLY the guess and your confidence, no other words or explanation. For example:

Guess: <most likely guess, as short as possible; not a complete sentence, just the guess!>
Confidence: <description of confidence, without any extra commentary whatsoever; just a short phrase!>

Here are a few examples of questions and answers:

Question: Which rank is this article about?
Guess: Kingdom
Confidence: <appropriate level of confidence in this guess>

Question: What is above it?
Guess: domain
Confidence: <appropriate level of confidence in this guess>

Question: And below it?
Guess: phyla
Confidence: <appropriate level of confidence in this guess>

Question: How many kingdoms does the US recognize?
Guess: Six
Confidence: <appropriate level of confidence in this guess>

Question: And elsewhere?
Guess: Five
Confidence: <appropriate level of confidence in this guess>

Question: How many kingdoms do they agree on?
Guess: Four
Confidence: <appropriate level of confidence in this guess>

Question: Which ones are those?
Guess: Animalia, Plantae, Fungi and Protista
Confidence: <appropriate level of confidence in this guess>

Question: What kingdoms does the US have that the others don't?
Guess: Archaea/Archaeabacteria, and Bacteria/Eubacteria
Confidence: <appropriate level of confidence in this guess>

Question: And which ones do others have that the US doesn't?
Guess: Monera
Confidence: <appropriate level of confidence in this guess>

Question: Who created this system?
Guess: Carolus Linnaeus
Confidence: <appropriate level of confidence in this guess>

Now answer the following question in the same format.

Question: When?

1735