Style - write a partition sentence

Things you can partition

A product (essay 1)	There are three main types of tea - green black, and oolong - of which black is the most difficult to consume ethically, and is the topic of this essay
An animal (essay 2)	There are seven types of tiger, including Siberian and Bengal, of which the most endangered is the Shikoku Tiger.
A process	There are three main steps in making X - 1,2, and 3 - of which the most difficult is 2.
Areas	THere are two main cotton producing areas - Shikoku and Kazakhstan - of which Shikoki is the most famous.

Style: Useful patterns

Option 1: "There are"

There are	NUMBER kinds of	TOPIC	COMMA/HYPHEN/COLON + LIST	Optional Comment
There are	many kinds of	Japanese dog	, including Shiba and Akita	. (no comment)
There are	hundreds of	crab species	, including rock and spider	. This topic was chosen because
There are	two kinds of	diamond	: conflict free, and not free	. Of these, the most famous/problematic/endagered is Y... ...which is why it was chosen for this essay
There are	two main buildings	on this campus	: the hill and the dome	. The most X, and the topic of this essay, is Y
There are	three main steps	in the product's life	- making, using, and recycling	- of which the stage that causes most problems is recycling.
There are	two main kinds of	Japanese dog	- Shiba and Akita	- of which Shiba is the cutest.
There are	hundreds of types of	Beetle	, including Stag and kuwagata,	but this essay concentrates on the dung beetle.

Option 2: "The"

There are	NUMBER kinds of	TOPIC	COMMA/HYPHEN/COLON + LIST	Optional Comment
The	two main kinds of	Japanese dog	are Shiba and Akita	, and of these the most common is the Akita.
The	most common	Japanese dogs	are the Shiba and the Akita	of which X is the most Y, and the topic of this essay.
The	most endangered	large cats	are the Bengal and the Siberian	. (no comment)
The	two kinds of	diamond	discussed are conflict free, and blood diamonds.	BLood diamonds were chosen as the topic because...
The	three main	conflict minerals	described here are Nickel, Cadmium, and Tantalum.	Of these, Tantalum is the worst, and so was chosen...

Option 3: For longer lists or special types of category

division	verb	number	split type	COMMA/HYPHEN/COLON + LIST
X	can be divided into	7	types	- 1, 2, 3, 4, 5, 6 and 7.
X	can be split into	four	kinds based on colour	- red, green, blue, and pink
X	consists of	three	main isotopes	: U233, U235 and U238

Tips

CAREFUL. You can partition "dogs", but not "Shiba" - start at the right level.
If your topic has one well-known form (e.g. Gold), normal partition is hard.

However, you can always find something:

conflict Gold and conflict-free Gold
three main gold-producing areas

if you want a comment in the same sentence, don't use colons in Option 1/2. They introduce a list, which must finish.

Use commas or colons (", of which" " - of which")
Use a new sentence (". Of these")

Your teacher might talk about "classification-partition" in the future

a classification is the first half when you write a definition sentence)
Careful - it's really hard to write both a partition and a definition/classification
If you want to define AND partition, go UP a level for your definition: "Tigers are a kind of big cat. There are seven kinds of tiger"*