code: def _max_cardinality_node(G, choices, wanna_connect):
      """Returns a the node in choices that has more connections in G
      to nodes in wanna_connect.
      """
      max_number = -1
      for x in choices:
          number = len([y for y in G[x] if y in wanna_connect])
          if number > max_number:
              max_number = number
              max_cardinality_node = x
      return max_cardinality_node
  
file_path: networkx/networkx/algorithms/chordal.py
imports: import sys
  import networkx
  from networkx.algorithms.components import connected_components
  from networkx.utils import arbitrary_element, not_implemented_for
label_desc: Use image node_id 7 for calling a global function with example usage: _max_cardinality_node(G, choices, wanna_connect) and returns: max_cardinality_node