The form of attack was well known among children who watched the show.

The adult form of my species is not yet known.

The original form and meaning of the name are not known for certain.

This form of information collection is known as open source intelligence.

The original form probably originated in the 12th century and is known to have been played for at least six hundred years.

Among these points is one of the distinctive form known as a "bird point".

Since the functional form of is not known, we need to estimate it.

An even more general form is better known under a different name:

A 350 million year old form was known to grow quite large, at up to 6 cm (2.4 in).

Actually, the tea table is the only Philadelphia example of this form known to survive.