code: private String[] getLoadline(
              Pair<BrainRegionDictTerm, BrainRegionDictTerm> pair, int pmId) {
  
          BrainRegionDictTerm br1 = pair.getKey();
          BrainRegionDictTerm br2 = pair.getValue();
  
          return new String[] { pmId + "",//
                  br1.getEntityId(), br1.getBegin() + "", br1.getEnd() + "", //
                  br2.getEntityId(), br2.getBegin() + "", br2.getEnd() + "" };
      }
docs: `pubmed_id`,`region_1_id`,`region_1_start`,`region_1_end`,`region_2_id`,`
  region_2_start`,`region_2_end`