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heartbeats = HEARTBEAT({
                       applicationtimedelay = 1000,
                       realtimedelay = 1000,
                       sendalwaysheartbeat = 'false',
                       allowoutofordercreation = 'false',
                       startatcurrenttime = 'true',
					   sendOnlyOneHeartbeat = 'true'                                                                                                                    
                       },
                       input
                     )
                        
output= PREDICATEWINDOW({
                        start = 'true',
                        end = 'false',
                        closewindowwithheartbeat = 'true'                                                                        
                        },
                        graph_data_with_heartbeat
                      )