title: beautifulsoup, Find th with text 'price', then get price from next th
body: <p>My html looks like:</p>
  
  <pre><code>&lt;td&gt;
     &lt;table ..&gt;
        &lt;tr&gt;
           &lt;th ..&gt;price&lt;/th&gt;
           &lt;th&gt;$99.99&lt;/th&gt;
        &lt;/tr&gt;
     &lt;/table&gt;
  &lt;/td&gt;
  </code></pre>
  
  <p>So I am in the current table cell, how would I get the 99.99 value?</p>
  
  <p>I have so far:</p>
  
  <pre><code>td[3].findChild('th')
  </code></pre>
  
  <p>But I need to do:</p>
  
  <p><strong>Find th with text 'price', then get next th tag's string value.</strong></p>