Classify each of the following as being opaque or transparent: Window, wall, lens, glass, wood, cement
Window: Transparent
Wall: Opaque
Lens: Transparent
Glass: Transparent
Wood: Opaque
Cement: Opaque
Instruction: Classify each of the following as being opaque or transparent: Window, wall, lens, glass, wood, cement
Context: 
Response: Window: Transparent
Wall: Opaque
Lens: Transparent
Glass: Transparent
Wood: Opaque
Cement: Opaque