title: How can I find the Xpath of a HTML tag's title attribute and print the text of said title
body: <p>I am using pythons scrapy library. I want to be able to scrape the text contained within the <code>&lt;h1&gt;</code>'s <code>title</code> attribute from the following html code using Xpath selectors.</p>
  
  <pre><code>&lt;h1&gt;
    &lt;a href="https://www.facebook.cpm/" title="Go to Facebook home"&gt;
      &lt;i class="fb_logo img sp_z3EmYTfbUvU_1_5x sx_91465b"&gt;...&lt;/i&gt;
     &lt;/a&gt;
  &lt;/h1&gt; 
  </code></pre>
  
  <p>This is what I tried already, but it does not work. How can this be made to work?</p>
  
  <pre><code>response.xpath('//h1/a/title()').extract()
  </code></pre>
  
  <p>The data I require is as follows:</p>
  
  <pre><code>"Go to Facebook home"
  </code></pre>