The records of the Company are therefore precious, and constitute part of the memory of the world.

UNESCO: 2010 UK Memory of the World Register

That said, paid ads constitute only one part of what marketers can do on Facebook.

FORBES: Just Because Facebook Ads Don't Work For GM Doesn't Mean They Don't Work

The rare 19th-century first editions may constitute the most conservative part of the collection, but many of the items from that period are remarkable.

ECONOMIST: French book collecting

Since then Nato has used its defensive role to justify a more proactive approach to "out of area" activities - arguing that instability in any part of Europe would constitute a threat to its members.

BBC: Profile: Nato

Previously, adultery could count as provocation, but under the new loss of control defence, sexual infidelity - "real or imagined" - on the part of the victim does not constitute sufficient grounds for reducing murder to manslaughter, the ministry said.

BBC: Defence law changes for killing after domestic abuse

Women constitute half of the world population and they are an important part of the media consumers.

UNESCO: Communication and Information