text: Will: hi, where are you?
  Tommy: on the bus to Boston
  Will: mega?
  Tommy: yes
  Will: me too!
  Will: When did you leave?
  Tommy: 12.40
  Will: pity, we've just left
  Tommy: I know, Peter told me that you're taking the bus at 13.40
  Marie: But I am on the 13.40 bus as well!
  Marie: Will, are you upstairs?
  Will: I am, in the front row
  Marie: I'm coming in 5 min :)
target: Tommy is on the bus to Boston. Tommy took a bus an hour before Will. Marie is in the same bus as Will. Marie and Will are going to meet upstairs in 5 minutes.