code: def load_dfcv():
      """
      A toy example of a time dependent dataset. ::
  
  
          Size: (14, 6)
          Example:
  
           start  group  z  stop  id  event
               0    1.0  0   3.0   1   True
               0    1.0  0   5.0   2  False
               0    1.0  1   5.0   3   True
               0    1.0  0   6.0   4   True
  
  
      References
      -----------
      From http://www.math.ucsd.edu/~rxu/math284/slect7.pdf
      """
      from lifelines.datasets.dfcv_dataset import dfcv
  
      return dfcv.copy()
  
imports: import pandas
  from importlib import resources
label_desc: Use image node_id 22 for calling a global function with example usage: load_dfcv() and returns: dfcv