text: Justin: Hello Greg
  Gregory: Hello
  Justin: Remember, some time ago we talked about smog and air pollution in general.
  Gregory: True we did. It's 250% WHO today.
  Justin: Objectively it is horrible but as for what was going on in the past few weeks I'd say it's not bad.
  Gregory: Exaclty, getting used to the 'smell of the city'.
  Justin: I wanted to show you what I bought
  Justin: <file_other>
  Gregory: Air purifier! Well done.
  Justin: This one removes not only PM2.5 and PM10 but also dust and mites.
  Gregory: Is it quiet? I'm not sure how loud 31dB is.
  Justin: Its' almost impossible to hear it working.
  Justin: But it has three different modes and if you want it to clean the air quickly then it's like a computer's fan.
  Gregory: You almost convinced me to buy it. I'm going to read more about purifiers now.
  Justin: If you need any help or advice, just let me know.
  Gregory: Thank you and have a nice day.
  Justin: You too.
target: Justin and Gregory are concerned about air pollution in their city. Justin bought an air purifier. Gregory is planning to buy one as well.