salt lamp subgroup of lamp, 10 assertions
CapableOf 4
turn white 0.37
emit negative ions 0.32
clean the air 0.32
turn black 0.16
HasProperty 3
unique 0.65
safe 0.23
useful 0.16
IsA 1
hygroscopic 0.32
MadeOf 1
salt crystals 0.32
ReceivesAction 1
cleaned with damp brush 0.68