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 L01 CFG: Phrase structure tree


     PHRASE STRUCTURE TREE

o  Leaf nodes of tree, read in left to right order give us sentence
   + Ex:  'The child saw Mohan' from

            S              
            |              
      .-----------.        
      |           |        
     NP          VP        
      |           |        
   .----.     .------.     
   |    |     |      |     
  det   n     v     NP     
   |    |     |      |     
  the child  saw n-proper  
                     |     
                   Mohan   
                         

o  Groups - related elements togehter
   + Ex:  'the child'

        NP     
         |     
      .----.   
      |    |   
     det   n   
      |    |   
     the child 
          

o  Hierarchy of grouped elements
   + Ex.1: Groupings
     - v (for verb 'saw')
     - NP (for 'Mohan')
     * Put them together in VP.

   + Ex.2: Groupings:
     - NP (for 'the child')
     - VP (for 'saw Mohan')
     * They are put together in S.

o Terminology: Mother and daughter nodes
  + Ex. NP is mother node, and 'det' and 'n' are
    daughter (or children) nodes.
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