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:
Dissolution_of_the_Soviet_Union

Context:
The CTAG (Latvian: Cilvēktiesību aizstāvības grupa, Human Rights Defense Group) Helsinki-86 was founded in July 1986 in the Latvian port town of Liepāja by three workers: Linards Grantiņš, Raimonds Bitenieks, and Mārtiņš Bariss. Its name refers to the human-rights statements of the Helsinki Accords. Helsinki-86 was the first openly anti-Communist organization in the U.S.S.R., and the first openly organized opposition to the Soviet regime, setting an example for other ethnic minorities' pro-independence movements.[citation needed]

Question:
What group was the first to oppose the Soviet government publicly?

Helsinki-86