code: def _parse_face(face_row):
      """Parses a line in a PLY file which encodes a face of the mesh."""
      face = [int(index) for index in face_row.strip().split()]
      # Assert that number of vertices in a face is 3, i.e. it is a triangle
      if len(face) != 4 or face[0] != 3:
          raise ValueError(
              "Only supports face representation as a string with 4 numbers."
          )
  
      return face[1:]
  
imports: import numpy
  import tensorflow
label_desc: Use image node_id 2 for calling a global function with example usage: _parse_face(face_row) and returns: face