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. What group was the first to oppose the Soviet government publicly?