Material Compound	Material Organic Compound	Source
http://sweet.jpl.nasa.gov/2.3/matrCompound.owl#Clathrate	http://sweet.jpl.nasa.gov/2.3/matrCompound.owl#Clathrate	SAME_URI
http://sweet.jpl.nasa.gov/2.3/matrCompound.owl#Compound	http://sweet.jpl.nasa.gov/2.3/matrCompound.owl#Compound	SAME_URI