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1: Active solar heating system 2: Soil 3: Community 4: Feeder 5: Lead 6: Carbon 7: Human 8: Current 9: Range 10: Water 11: Process 12: Environment 13: Contamination 14: Condition 15: Electricity 16: Fishery 17: Atom 18: Conservation 19: Hazard 20: Plant (As of 19:38)
Off-frame data (the preferred term is --->auxiliary data.)
