In this task, you are given a question and a context passage. You have to answer the question based on the given passage.
Q: What behind the scenes information do the tribunals have?, Context: International tribunals and arbiters are often called upon to resolve substantial disputes over treaty interpretations. To establish the meaning in context, these judicial bodies may review the preparatory work from the negotiation and drafting of the treaty as well as the final, signed treaty itself.
A:
preparatory work