anchor.diff:                  end, Graph, Membership).
   
   %% @private
  -bucket_name() ->
  +prefix(File) ->
       % Simulation = lasp_config:get(simulation, undefined),
       % EvalIdentifier = lasp_config:get(evaluation_identifier, undefined),
       EvalTimestamp = lasp_config:get(evaluation_timestamp, 0),
  -    integer_to_list(EvalTimestamp).
  +    integer_to_list(EvalTimestamp) ++ "/" ++ File.
  +
  +%% @private
  +bucket_name() ->
  +    "marathon".
   
   %% @private
   clients_from_marathon() ->
  
positive.code:     {ok, Nodes} = lasp_peer_service:members(),
  
      %% Store membership.
      Node = atom_to_list(node()),
      Membership = term_to_binary(Nodes),
      erlcloud_s3:put_object(BucketName, Node, Membership),
  
  
negative.code:     BucketName = bucket_name(),
  
      GraphFun = fun({N, _, _}=Peer, _Graph) ->
                         Node = prefix(atom_to_list(N)),
                         try
                             Result = erlcloud_s3:get_object(BucketName, Node),
                             Body = proplists:get_value(content, Result, undefined),
  