Assertion: transparent mirror | /r/HasProperty | set into wall
Facets:
value: with open areas behind them
type: LOCATION
Source sentences:
text: Also, rapping on the mirror should provide an aural clue: ordinary mirrors have backings and are usually placed against walls, so rapping on them will generally produce dull thuds; transparent mirrors are set into walls with open areas behind them, so rapping on them should produce much more open, hollow sounds.