The sidereal period of the planet is 365.25 days.

The peregrine hawk is known for its incredible speed and agility.

Peregrine hawks are known for their incredible speed and agility.

The Migration Period, also known as the Barbarian Invasions, was a period of widespread migrations of peoples in Europe during the decline of the Western Roman Empire.

I saw a little person at the grocery store.

Her last name is Perch.

I have achieved v-perfect in my exams.

She is a perfect singer.

I bought a box of percussion caps for my musket.

Real person fiction is a genre of literature that features fictional stories with real people as characters.