http://oxforddictionaries.com/words/semicolon
The web is littered with examples for semicolons
http://www.apastyle.org/learn/faqs/use-semicolon.aspx http://www.englishclub.com/writing/punctuation-semi-colon.htm
It's basic English.
I know what semicolons are for; they’re one of the basic tools of my trade. I notice you’re not answering my questions. Like many birthers, you’re willing to focus on the fragment of a sentence that you think supports your case and ignore how it fits in with the rest of the text around it.