Connotation is an implied meaning it can be negative or positive.
The British Invasion was a movement of the 60s where musicians from the U.K. would come to the United States to perform and share their British culture. One of the most famous groups that was a part of the movement was the Beatles and they impacted pop music by bringing new sounds through their song writing
The fairly recent development of a theoretical framework describing how visual images communicate.
It seems that he is more secular since he was a composer.
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