code: def provide_g1_edgelist():
      return [(0, 1), (0, 2), (1, 2), (2, 4), (1, 3), (3, 4), (4, 5)]
  
imports: from datetime import date, datetime, timedelta
  import networkx
  from networkx.algorithms import isomorphism
label_desc: Use image node_id 1 for calling a global function with example usage: provide_g1_edgelist() and returns: list