Table: piano_features
Columns: model
graded_hammer_non_gh3
graded_hammer_three_gh3
natural_wood_keyboard
synthetic_ivory_keytops

Question: Which is Natural Wood Keyboard with a Model of clps306?
SQL: SELECT "natural_wood_keyboard" FROM piano_features WHERE "model" = 'clps306'

Question: Which Graded Hammer (Non GH3)  has a Model of cvp501?
SQL: SELECT "graded_hammer_non_gh3" FROM piano_features WHERE "model" = 'cvp501'

Question: Which Natural Wood Keyboard has a CLP380 ?
SQL: SELECT "natural_wood_keyboard" FROM piano_features WHERE "model" = 'clp380'

Question: Which Graded Hammer Three (GH3) shows Model of clp320?
SQL: SELECT "graded_hammer_three_gh3" FROM piano_features WHERE "model" = 'clp320'