ELEMENT 'a'
  TEXT '
  '
  ELEMENT 'b'
    TEXT '
    '
    ELEMENT 'c1'
      TEXT 'c1'
    END 'c1'
    TEXT '
    '
    ELEMENT 'c2'
      TEXT 'c2'
    END 'c2'
    TEXT '
  '
  END 'b'
  TEXT '
  '
  ELEMENT 'b1'
    TEXT 'b1'
  END 'b1'
  TEXT '
  '
  ELEMENT 'b2'
    TEXT 'b2'
  END 'b2'
  TEXT '
  '
  ELEMENT 'b3'
    TEXT 'b3'
  END 'b3'
  TEXT '
  '
  ELEMENT 'b4'
    TEXT ''
    TEXT 'This is CDATA'
    TEXT ''
  END 'b4'
  TEXT '
'
END 'a'