title: Error when trying to select event data with BigQuery
body: <p>I'm trying to select the <code>event_dim.date</code> within BigQuery but am unable to actually access it due to an error</p>
  
  <pre><code>Error: Cannot access field date on a value with type ARRAY&lt;STRUCT&lt;date STRING, name STRING, params ARRAY&lt;STRUCT&lt;key STRING, value STRUCT&lt;string_value STRING, int_value INT64, float_value FLOAT, ...&gt;&gt;&gt;, ...&gt;&gt; at [1:18]
  </code></pre>
  
  <p>My Query:</p>
  
  <pre><code>SELECT event_dim.date FROM `table`
  </code></pre>
  
  <p>I know I'm doing something wrong and any help would be greatly appreciated. Thanks!</p>