text before line im interested in which may include <a> tag </a>
Go to <a href="#step2"> Step 2</a>
text after line im intrested in which may also include <a> tag </a>

(?!(Go to|Return to|Continue to)( )?)(<a(.*)?>(?!(( )?Step d( )?))(.*)?</a>)|(<a.*(Go to|Return to|Continue to).*/a>)