(Fourteen years ago) a city of (400,000 people) on (this side of the river) heard of a projected suspension bridge. . . . The (span was so long), the height so great, and the enterprise likely to be so costly, that few thought of it as something begun in earnest. . . . But Science said, ("It is possible,") and Courage said, "It shall be!" To-day a city of 600,000 people welcomes (with enthusiasm) the wonderful creation of genius.

–Opening Ceremonies of the New York and Brooklyn Bridge, Seth Low

Which phrases/sentences that are in paraphrases from the passage above are important and not important when writing a objective summary?

Important:
Unimportant:
(I would love an explanation, please <3)