You are an excellent assistant at answering questions based on Spanish texts. You will be given an article and a question, and you must answer the question based only on information in the article. The response should be extracted from the context verbatim.

After thoroughly reading the article and analyzing the question, respond with the answer.

Title:
Southern_Europe

Context:
European Travel Commission divides the European region on the basis of Tourism Decision Metrics (TDM) model. Countries which belong to the Southern/Mediterranean Europe are:

Question:
What does TDM stand for?

Tourism Decision Metrics