title: Extracting the person names in the named entity recognition in NLP using Python
body: <p>I have a sentence for which i need to identify the Person names alone:</p>
  
  <p>For example:</p>
  
  <pre><code>sentence = "Larry Page is an American business magnate and computer scientist who is the co-founder of Google, alongside Sergey Brin"
  </code></pre>
  
  <p>I have used the below code to identify the NERs.</p>
  
  <pre><code>from nltk import word_tokenize, pos_tag, ne_chunk
  print(ne_chunk(pos_tag(word_tokenize(sentence))))
  </code></pre>
  
  <p>The output i received was:</p>
  
  <pre><code>(S
    (PERSON Larry/NNP)
    (ORGANIZATION Page/NNP)
    is/VBZ
    an/DT
    (GPE American/JJ)
    business/NN
    magnate/NN
    and/CC
    computer/NN
    scientist/NN
    who/WP
    is/VBZ
    the/DT
    co-founder/NN
    of/IN
    (GPE Google/NNP)
    ,/,
    alongside/RB
    (PERSON Sergey/NNP Brin/NNP))
  </code></pre>
  
  <p>I want to extract all the person names, such as</p>
  
  <pre><code>Larry Page
  Sergey Brin
  </code></pre>
  
  <p>In order to achieve this, I refereed this <a href="https://stackoverflow.com/questions/30664677/extract-list-of-persons-and-organizations-using-stanford-ner-tagger-in-nltk">link</a> and tried this. </p>
  
  <pre><code>from nltk.tag.stanford import StanfordNERTagger
  st = StanfordNERTagger('/usr/share/stanford-ner/classifiers/english.all.3class.distsim.crf.ser.gz','/usr/share/stanford-ner/stanford-ner.jar')
  </code></pre>
  
  <p>However i continue to get this error: </p>
  
  <pre><code>LookupError: Could not find stanford-ner.jar jar file at /usr/share/stanford-ner/stanford-ner.jar
  </code></pre>
  
  <p>Where can i download this file?</p>
  
  <p>As informed above, the result that i am expecting in the form of list or dictionary is :</p>
  
  <pre><code>Larry Page
  Sergey Brin
  </code></pre>