Original sentence: It has been considered an "Ellis Island" of the 21th century.Seattle's robust economy and multi-cultural backgrounds has attracted immigrants from all over the world
Edited sentence: It is like New York was in the days of Ellis Island but is not now because it is so big.Perhaps Seattle is smaller but still pretty big, and so many people are coming to it.Seattle is a rich city so many come to make a fortune.There are many in Seattle who are originally International and not American