title: AWS Ground Truth text classification manifest using "source-ref" not displaying text
body: <h2>Background</h2>
  
  <p>I'm trying out SageMaker Ground Truth, <a href="https://docs.aws.amazon.com/sagemaker/latest/dg/sms.html" rel="nofollow noreferrer">an AWS service to help you label your data before using it in your ML algorithms</a>.</p>
  
  <p>The labeling job requires a manifest file which contains a JSON object per row that contains a <code>source</code> or a <code>source-ref</code>, see also the <a href="https://docs.aws.amazon.com/sagemaker/latest/dg/sms-data-input.html" rel="nofollow noreferrer">Input Data section</a> of the documentation. </p>
  
  <h2>Setup</h2>
  
  <p>Source-ref is a reference to where the document is located in an S3 bucket like so</p>
  
  <pre><code>my-bucket/data/manifest.json
  my-bucket/data/123.txt
  my-bucket/data/124.txt
  
  ...
  </code></pre>
  
  <p>The manifest file looks like this (based on the <a href="https://aws.amazon.com/blogs/aws/amazon-sagemaker-ground-truth-build-highly-accurate-datasets-and-reduce-labeling-costs-by-up-to-70/" rel="nofollow noreferrer">blog example</a>) :</p>
  
  <pre><code>{"source-ref": "s3://my-bucket/data/123.txt"}
  {"source-ref": "s3://my-bucket/data/124.txt"}
  ...
  </code></pre>
  
  <h2>The problem</h2>
  
  <p>When I create the job, all I get is the <code>source-ref</code> value: <strong>s3://my-bucket/data/123.txt</strong> as the text, the contents of the file are not displayed.</p>
  
  <p>I have tried creating jobs using a manifest that does not contain the s3 protocol, but I get the same result.</p>
  
  <p>Is this a bug on their end or I'm I missing something?</p>
  
  <h2>Observations</h2>
  
  <ul>
  <li>I have tried to make all files public, thinking there may maybe permissions issue? but no</li>
  <li>I ensured that the content type of the file was text (s3 -> object -> properties -> metadata)</li>
  <li>If I use "source" and inline the text, it works properly, but I should be able to use individual documents as there is a limit on the file size specially if I have to label many or large documents!</li>
  </ul>