Every piece of equipment on the tarmac had some failure: some boarding stairs missed some stairs, some carts had no wheels, and some aircraft had no engines.
There was some disorder in the class: some students were chatting, some were doing the homework, and yet some were sleeping at their desks.
In general, people were not happy: some were merely stern, some were resentful and some were almost mad.
Mammals are those animals that feed their young with milk: cows, tigers, dogs, rabbits.
What would be the idiomatic term for each of the statement preceding the colon (in the examples above, each such statement is put in italics) and for the each of the following phrase separated by commas (put in bold)?