###INSTRUCTION: Fix grammar in this sentence: In the aspect of the research of construction content, the researches by Buffel and Phillipson (2011) found that older adults ' subjective well-being have a direct relations with built environment of the communities.
###RESPONSE: 
In the aspect of the research of construction contents, the research by Buffel and Phillipson (2011) found that older adults ' subjective well-being has a direct relation with the built environment of the community.
In the aspect of the research of construction content, the researches by Buffel and Phillipson (2011) found that older adults' subjective well-being has a direct relation to built environments of the communities.