code: def host(self):
          '''Return the host committee.
          '''
          _id = None
          for participant in self['participants']:
              if participant['type'] == 'host':
                  if set(['participant_type', 'id']) < set(participant):
                      # This event uses the id keyname "id".
                      if participant['participant_type'] == 'committee':
                          _id = participant['id']
                          if _id is None:
                              continue
                          return self.committees_dict.get(_id)
                  else:
                      return participant['participant'f host(self):
          '''Return the host committee.
          '''
          _id = None
          for participant in self['participants']:
              if participant['type'] == 'host':
                  if set(['participant_type', 'id']) < set(participant):
                      # This event uses the id keyname "id".
                      if participant['participant_type'] == 'committee':
                          _id = participant['id']
                          if _id is None:
                              continue
                          return self.committees_dict.get(_id)
                  else:
                      return participant['participant']
docs: Return the host committee.