Well, some people collect rocks, so you could write:
I have collected rocks from San Francisco, Washington, D.C., and Boston.
The internalized attitudes, expectations, and viewpoints of society is called generalized other.
In sociology, generalized other is described as an individual's internatilized impression and expectation of other people in society. The term derives from George Herbert Mead's "The I and the Me" theory.
Answer: Slaves sing most when they are most unhappy. The songs of the slave represent the sorrows of his heart; and he is relieved by them, only as an aching heart is relieved by its tears.
Explanation: hope this helps :)
B. he describes his son's rare mathematical background