title: Stanford corenlp interactive tregex tool results differ from the constituency parse
body: <p>Can anyone explain why nlp tags from tregex response differs from the tags obtained in constituency parse as shown in the figure below.</p>
  
  <p><a href="https://i.stack.imgur.com/PNXlI.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/PNXlI.png" alt="enter image description here"></a></p>
  
  <p>In the above figure, <strong>engineer</strong> is tagged as <strong>NN</strong> by <em>constituency parse</em> annotator, but <em>tregex</em> outputs it as <strong>NNP</strong>.</p>
  
  <p>Is it because the annotator pipeline used to perform constituency parse uses a different parse model compared to the pipeline used to perform tregex?</p>