Q: In this task, you're given passages that contain mentions of names of people, places, or things. Some of these mentions refer to the same person, place, or thing. Your job is to write questions that evaluate one's understanding of such references. Good questions are expected to link pronouns (she, her, him, his, their, etc.) or other mentions to people, places, or things to which they may refer. Do not ask questions that can be answered correctly without understanding the paragraph or having multiple answers. Avoid questions that do not link phrases referring to the same entity. For each of your questions, the answer should be one or more phrases in the paragraph, and it should be unambiguous.
Passage: Sawtooth National Forest is managed by the U.S. Forest Service, an agency within the Department of Agriculture, as four units: the Fairfield (420,720 acres or 170,260 hectares), Ketchum (321,544 acres or 130,124 hectares), and Minidoka (604,108 acres or 244,474 hectares) Ranger Districts and Sawtooth National Recreation Area (SNRA). The forest's headquarters are in Jerome, where they moved to in 2018 after 32 years of being headquartered in Twin Falls. The Minidoka Ranger District is separated into the Albion (95,000 acres or 38,000 hectares), Black Pine (90,000 acres or 36,000 hectares), Cassia (234,000 acres or 95,000 hectares), Raft River (95,000 acres or 38,000 hectares), and Sublett (90,000 acres or 36,000 hectares) divisions.Guard stations and work camps dot the forest. The SNRA headquarters and main visitor center are located north of the city of Ketchum, while there is a ranger station in Stanley and visitor center at Redfish Lake. There are more than 25,000 acres (10,000 ha) of private land inholdings within the forest, and it is bordered by the Boise and Salmon-Challis National Forests as well as private, state, and Bureau of Land Management land. Curlew National Grassland is 1.5 mi (2.4 km) from the Sublett Division's eastern boundary. Small portions of the area originally designated as Sawtooth National Forest are managed by the Boise and Challis National Forests, while the Sawtooth manages portions of the Boise and Challis National Forests.Sawtooth National Forest balances interests of different groups, such as those interested in recreation, preservation, or resource extraction. The forest practices conservation of resources, in some areas allowing for production of raw materials, such as lumber for construction purposes and wood pulp for paper products, alongside recreational uses, while in other areas only recreation is permitted. Additionally, mineral extraction through mining and oil and natural gas exploration and recovery are also conducted, though in Sawtooth National Forest this has become less common due to a consensus to protect the natural surroundings. Leases offered to ranchers to allow them to graze cattle and sheep on the forest are common. The forest provides guidelines and enforces environmental regulations to ensure that resources are not overexploited and that necessary commodities are available for future generations.
A:
What are the four units of Sawtooth National Forest?