Question: Which region did the Sami flag belong to? 

Context paragraphs:
Genetic studies on Sami: Since the early years of genetic research, the Sami people have caught the interests of scientists.  The Sami languages belong to the Uralic languages family of Eurasia.  Some earlier anthropologists have suggested they might be of Asian and/or Siberian origin.  The frequency of blood group and protein polymorphisms in Sami differs significantly from the general Northern European population.

Sámi Conference: The first international Sámi Conference was officially opened in Jokkmokk, Sweden on August 31, 1953 and closed four days later on September 3.  Since then, the Sámi conferences have come to be important venues for the Sámi across Norway, Sweden, Finland and Russia to come together and discuss critical Sámi issues.  Delegates have used the conferences as a forum to approve cultural symbols such as the Sami flag, the Sámi anthem Sámi soga lávlla, Sami National Day, etc.

Sami native region (Finland): The Sami native region of Finland ("Saamelaisten kotiseutualue" in Finnish, "Sámiid ruovttuguovllu" in Northern Sami, "Samernas hembygdsområde" in Swedish) is the northernmost part of Lappi administrative region in Finland (formerly Lappi Province), home of approximately half of Finland's Sami population.  The area is defined in and protected by the Finnish constitution (17 § and 121 §) to be autonomous on issues relating to the Sami culture and language.

Sami flag: The Sami flag is the flag of Sápmi and the Sámis, the indigenous people of the Nordic countries and the Kola Peninsula of the Russian Federation.

Astrid Båhl: Astrid Båhl (born Astrid Margarete Bål; 1959) is a Norwegian Sami artist who designed the Sami flag.

Velda: Velda is a name given to the hypothetical ancestress of the Cantabrian people and Haplogroup V (mtDNA).  She was coined in the book "The Seven Daughters of Eve" by Bryan Sykes.  Theoretically, based on DNA studies, she lived in the region of the Cantabrian mountains about 15,000 BC.  Even today, Haplogroup V is found with particularly high concentrations in the people of Cantabria (15%) of northern Iberia but specially in the Sami people of northern Scandinavia: Swedish Sami (68%), Finnish Sami (37%) and Norwegian Sami (33%).

Flag of the Green Mountain Boys: The flag of the Green Mountain Boys began as a regimental flag used by the Green Mountain Boys.  A remnant of a Green Mountain Boys flag, believed to belong to John Stark, is owned by the Bennington Museum.  It still exists as one of the few regimental flags from the American Revolution.  Although Stark was at the Battle of Bennington and likely flew this flag, the battle has become more commonly associated with the Bennington flag, which is believed to be a 19th-century banner.

Johan Turi: Johan Turi, born Johannes Olsen Thuri also spelt Johan Tuuri or Johan Thuri or Johan Thuuri (March 12, 1854 – November 30, 1936) was the first Sami author to publish a secular work in a Sami language.  His first book was called "Muitalus sámiid birra" ("An Account of the Sami") and tells about the life of people herding reindeer in the Jukkasjärvi region of northern Sweden at the beginning of the 20th century.  An eclectic and nuanced text, "Muitalus" includes details on Sami traditions of child rearing, hunting, healing, yoik, and folklore.  At its heart the text aims to draw outsiders' attention to the intrinsic value of Sami culture.

Sápmi: Sápmi (), in English commonly known as Lapland ( ), is the cultural region traditionally inhabited by the Sami people, traditionally known in English as Lapps.  Sápmi is located in Northern Europe and includes the northern parts of Fennoscandia.  The region stretches over four countries: Norway, Sweden, Finland, and Russia.  On the north it is bounded by the Barents Sea, on the west by the Norwegian Sea and on the east by the White Sea.

Skolts: The Skolt Sámi or Skolts are a Sami ethnic group.  They currently live in and around the villages of Sevettijärvi, Keväjärvi, Nellim in the municipality of Inari, at several places in the Murmansk Oblast and in the village of Neiden in the municipality of Sør-Varanger.  The Skolts are considered to be the indigenous people of the borderland area between present-day Finland, Russia and Norway, i.e. on the Kola Peninsula and the adjacent Fenno-Scandinavian mainland.  They belong to the eastern group of Sámi on account of their language and traditions, and are traditionally Orthodox rather than Lutheran Christians like most Sami and Finns.

Supporting paragraphs: Sami flag Sápmi
Answer: Lapland