With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Prometheus is a motion picture.
text_B: The Martis were a group of Native Americans who lived in Northern California on both the eastern and western sides of the Sierra Nevada .. California. California. Nevada. Nevada. Native Americans. Native Americans in the United States. Northern California. Northern California. Sierra Nevada. Sierra Nevada ( U.S. ). The Martis complex lasted from 2000 BCE to 500 CE , during the Middle Archaic era .. Middle Archaic era. Archaic period in the Americas. Evidence of Martis habitation has been found from Carson River and Reno , Nevada in the east to Auburn , California and Oroville , California in the west .. California. California. Nevada. Nevada. Carson River. Carson River. The Martis name refers to the geographic region of Martis Creek which spans Nevada County , California and Placer County , California .. Nevada County. Nevada County, California. California. California. Nevada. Nevada. Martis Creek. Martis Creek
not_related.