code: def main(x):
      """main function."""
      return park2_3(x)
  
imports: import numpy
  from synthetic.park2_4.park2_4 import sub_park_1, sub_park_2, sub_park_3, sub_park_4
label_desc: Use image node_id 4 for calling a global function with example usage: main(x) and returns: park2_3