code: def conll_file_demo():
      print("Mass conll_read demo...")
      graphs = [
          DependencyGraph(entry)
          for entry in conll_data2.split("\n\n")
          if entry
      ]
      for graph in graphs:
          tree = graph.tree()
          print("\n")
          tree.pprint()
  
imports: import subprocess
  import warnings
  from collections import defaultdict
  from itertools import chain
  from pprint import pformat
  from nltk.internals import find_binary
  from nltk.tree import Tree
label_desc: Use image node_id 5 for calling a global function with example usage: conll_file_demo() without return types