title: Need to perform n-gram on the dataset
body: <p>I need to perform n-gram on the below dataset.</p>
  
  <p><code>Column 1</code></p>
  
  <p><code>Electronic, socket, clamp, cooler</code></p>
  
  <p><code>Actuator, cylinder, valve</code></p>
  
  <p><code>Hydraulic, electronic, cooler</code></p>
  
  <p><code>Actuator, Pnematic, cylinder, valve</code></p>
  
  <p>I need the output like below,</p>
  
  <pre><code>Column 1
  
  Electronic_socket, socket_clamp, clamp_cooler
  
  Actuator_cylinder, cylinder_valve
  
  Hydraulic_electronic, electronic_cooler
  
  Actuator_Pneumatic, Pneumatic_cylinder, cylinder_valve
  </code></pre>