answer: #Person2# tells #Person1# about the schedule of the building work. #Person1#'ll confirm the date of moving the machinery with suppliers.
documents: #Person1#: I see there are some workmen on the site. When is the building work due to start?
  #Person2#: Well, it'll take three weeks to demolish the old building and clear away the debris. We should be ready to start the construction work in week 23.
  #Person1#: How long will the sub contractors be on site?
  #Person2#: About ten weeks in total if everything goes according to plan.
  #Person1#: I'm sure it will. So, we should be able to start moving the machinery in during week 34. I'll confirm that date with our suppliers.