description of simulation.log

I couldn’t find any description on the gatling site for the format of the simulation.log?
Specifically what do the 4 timestamps mean?

ACTION Scenario Name 1 request_1 1358286500405 1358286500405 1358286501515 1358286501710 OK


requestStart (first byte sent), requestEnd (last byte sent), responseStart (first byte received), responseEnd (last bytes received)

Also what the third one means? In this example “14” means?

REQUEST “40 actions for 5 days” 14 /people/{userName}/places 1372829594137 1372829594138 1372829594346 1372829594352 OK

Oh, got it, it is the userID