Original: For example , an encyclopedia entry for Genghis Khan may begin with '' Genghis Khan ( c. 1162 -- August 18 , 1227 ) '' , suggesting that he was born in or around the year 1162 .
Simplified: An encyclopedia entry may begin with circa in the date of birth , for example : '' Genghis Khan ( c. 1162 -- August 18 , 1227 ) '' .