code: def get_clone(rec):
      
      s = rec.description
      chr = re.search(chr_pat, s)
      clone = re.search(clone_pat, s)
      chr = chr.group(1) if chr else ""
      clone = clone.group(1) if clone else ""
  
      return chr, clone
docs: >>> get_clone("Medicago truncatula chromosome 2 clone mth2-48e18")
      ('2', 'mth2-48e18')