Fix grammaticality: An elderly-friendly built environment is a key principle to which an elderly can adjust and integrate themselves into the community.
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The elderly are a group of people who are not only a part of the community, but also a part of the community.
The elderly are the people who are the most important to the community.
The elderly are the people who are the most important to the community.
The elderly are the people who are the most important to the community.
The elderly are the people who are the most important to the community.
The elderly are the people who are the most important to the community.