| http://www.w3.org/ns/prov#value | - Sounds such as background music to be played while the home robot either sits idle or performs tasks; ???earcons??????that is, sounds that convey meaning and which are played back when triggered by certain events or behaviors, such as the robot playing a car-crash ???earcon??? when the robot bump sensor detects a collision with an obstacle, or the phrase ???feed me!??? as an earcon when the robot'
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