<div itemscope itemtype="http://schema.org/SocialEvent">
    <a itemprop="url" href="www.convention-name.org">
        <div itemprop="name"><strong>Bob's Convention</strong></div>
    </a>
    <div itemprop="description">blah blah blah blah blah</div>
    <div>
        <meta itemprop="startDate" content="2015-05-01:00.000">
        Starts: 2015-05-01:00.000
    </div>
    <meta itemprop="endDate" content="2015-05-02:00.000">
    Ends: 2015-05-02:00.000

    <div itemprop="location" itemscope itemtype="http://schema.org/Place">
      <div itemprop="name">Unknown Venue</div>
      <div itemprop="address" itemscope itemtype="http://schema.org/PostalAddress">
          <div itemprop="streetAddress">55 street</div>
          <div><span itemprop="addressLocality">Nashville</span>, <span itemprop="addressRegion">TN</span></div>
          <div itemprop="postalCode">37225</div>
          <div itemprop="addressCountry">usa</div>
      </div>
  </div>
</div>