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:
Political_corruption

Context:
The purpose of these instruments was to address the various forms of corruption (involving the public sector, the private sector, the financing of political activities, etc.) whether they had a strictly domestic or also a transnational dimension. To monitor the implementation at national level of the requirements and principles provided in those texts, a monitoring mechanism – the Group of States Against Corruption (also known as GRECO) (French: Groupe d'Etats contre la corruption) was created.

Question:
What does GRECO stand for?

Group of States Against Corruption