Which line is a direct quotation from an external source?

“The Japanologist Donald Keene, from Columbia University, sees the wave as a metaphor for the changes in Japanese society . . .”
“The Japanese have a word for insular which is literally the mental state of the people living on islands: shimaguni konjo.”
“The Great Wave, like the other images in the series, was printed in at least 5,000 impressions, possibly as many as 8,000 . . .”
“This was cheap, popular art; but when printed in such quantities, to exquisite technical standards, it could be highly profitable.”