title: Regex to match first word in sentence
body: <p>I am looking for a regex that matches first word in a sentence excluding punctuation and white space. For example: "This" in "This is a sentence." and "First" in "First, I would like to say \"Hello!\""</p>
  
  <p>This doesn't work:</p>
  
  <pre><code>"""([A-Z].*?(?=^[A-Za-z]))""".r
  </code></pre>