dialogue: Sue: Are you going to the gym tonight?
  Alex: Yes. Feeling fat. U?
  Sue: Definitely.
  Alex: We r lazy buggers!
  Sue: Yes!
  Alex: I haven't run for ages.
  Sue: I never run. Too hard!
  Alex: It's good for weight loss. 
  Sue: Too hard on the knees.
summary: Alex and Sue are going to the gym tonight. Alex hasn't run in a while. Sue never runs as it's too hard on the knees.