In this task, you're given a passage, further information available on a particular linked term from the statement, and a question. Your job is to generate the answer to the question by using the information provided. If there is no clear answer obtainable, output 'none'.
Q: Passage: San Nicolas Island (Tongva: Haraasnga) is the most remote of California's Channel Islands, located 61 miles (98 km) from the nearest point on the mainland coast. It is part of Ventura County. The 14,562 acre (58.93km or 22.753 sq mi) island is currently controlled by the United States Navy and is used as a weapons testing and training facility, served by Naval Outlying Field San Nicolas Island. The uninhabited island is defined by the United States Census Bureau as Block Group 9, Census Tract 36.04 of Ventura County, California. The Nicoleno Native American tribe inhabited the island until 1835. As of the 2000 U.S. Census, the island has since remained officially uninhabited, though the census estimates that at least 200 military and civilian personnel live on the island at any given time. The island has a small airport, though the 10,000 foot runway is the second longest in Ventura County (slightly behind the 11,102 ft. at the Naval Air Station Point Mugu). Additionally, there are several buildings including telemetry reception antennas.
Link Information: The Channel Islands () form an eight-island archipelago Question: How many islands comprise the group that San Nicolas Island belongs to?
A:
Answer: eight