| http://www.w3.org/ns/prov#value | - Pet owner invents a doggie doorbell after his pooch kept scratching door to be let outsideKeith Jin of Eugene, Oregon, invented a 'doggy doorbell' so his greyhound Pebble can let him know when it needs to go outside and get back inJin says he is looking to create doorbells for other domesticated animals, including cats
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