These can be classified in various ways, such as by time or cause.

He would be classified in 35th place at the end of the race.

Sexual activity can be classified in a number of ways.

Taxes may be classified in a number of different ways.

Some of the material now produced should never have been classified in the first place.

Personal property may be classified in a variety of ways.

It was accepted into service and type classified in 1989.

There really wasn't too much that was classified in the mission.

From the time of the ancient world, at least, plants have been classified in two ways.

It was most recently classified in 2008 as a species of "least concern."