Example: the topic Iranian Hostage Crisis would yield a different perspective if the researcher gathers content originating from Iran. But note, the Iranians probably do not refer to the crisis as the "Iranian Hostage Crisis". They may refer to it as the American Hostage Crisis for example.
TIP: Using Google simply add the syntax below to your search substituting the .. for the country code.
cr=country..
Country codes can be found here.Another example: the partition of India in 1948. Searching Pakistan, India or Great Britain would yield different historical perspectives on that topic.