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natural gas → IsA → a fossil fuel	0.71
fossil fuel (subgroup of fuel) → ReceivesAction → burned	0.61
fossil fuel (subgroup of fuel) → ReceivesAction → consumed	0.48
fossil fuel (subgroup of fuel) → ReceivesAction → derived	0.45
crude oil → IsA → a fossil fuel	0.44
methane → IsA → a fossil fuel	0.44
propane → IsA → a fossil fuel	0.43
fossil fuel (subgroup of fuel) → CapableOf → produce heat	0.40
fossil fuel (subgroup of fuel) → CapableOf → account for 95 percent of the fuel	0.30
fossil fuel (subgroup of fuel) → HasA → carbon	0.30
fossil fuel (subgroup of fuel) → IsA → fuel	0.30
peat → IsA → a fossil fuel	0.30
fossil fuel (subgroup of fuel) → ReceivesAction → limited	0.29
fossil fuel (subgroup of fuel) → AtLocation → one time biomass	0.25
fossil fuel (subgroup of fuel) → CapableOf → continue to store the carbon	0.25
fossil fuel (subgroup of fuel) → ReceivesAction → depleted	0.25
fossil fuel (subgroup of fuel) → CapableOf → take millions of years	0.21
fossil fuel (subgroup of fuel) → CapableOf → become more expensive	0.16
diesel → IsA → a fossil fuel	0.16