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:
Treaty

Context:
In function and effectiveness, the UN has been compared to the pre-Constitutional United States Federal government by some[citation needed], giving a comparison between modern treaty law and the historical Articles of Confederation.

Question:
Modern treaty law can be compared in function and effectiveness to the historical Articles of Confederation by comparing the pre-Constitutional United States Federal government with what modern institution?

the UN