| http://www.w3.org/ns/prov#value | - Social isolation in the elderly can lead to depression and physical problems, such as loss of appetite and difficulty sleeping.App for senior citizensThere???s also a safety dimension.???Already, people are using the app to warn others about dangerous crosswalks, and subway stops that don???t have elevators,??? says Mihailidis.Some of the features users can rate, by indicating agreement or disagre
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