"crude" - key terms from Wikipedia

brent crude
conventional crude	oil
crude
crude	aconite
crude	birth rate
crude	bitumen
crude	carriers
crude	death rate
crude	fibre
crude	oil
crude	oil price
crude	oil production
crude	petroleum
crude	protein
extra heavy crude
gallons of crude	oil spilled
heavy crude	oil
light crude
nymex crude	oil
sour crude
sweet crude
synthetic crude	oil
very large crude