text: 
  import os, pandas
  import numpy as np
  from biothings.utils.dataload import dict_convert, dict_sweep
  from biothings import config
  logging = config.logger
  
  process_key = lambda k: k.replace(" ","_").lower()
  
  def setup_release(self):
      release="2019-06-23"
      return release
  
  
  def load_orthology(data_folder):
  
      infile = os.path.join(data_folder, "ORTHOLOGY-ALLIANCE_COMBINED.tsv")
      assert os.path.exists(infile)
  
      data_ortho=pandas.read_csv(infile, header=15, sep="\\t").to_dict(orient='records')
      results = {}
  
      for rec in data_ortho:
          orig_id1= rec["Gene1ID"].split(':')
          id1_tag2=orig_id1[1]
          _id = id1_tag2
          rec = dict_convert(rec,keyfn=process_key)
          # remove NaN values, not indexable
          rec = dict_sweep(rec,vals=[np.nan])
          results.setdefault(_id,[]).append(rec)
  
      for _id,docs in results.items():
          doc = {"_id": _id, "ortholog_info" : docs}
          yield doc
  