In a paragraph of seven to ten sentences, answer the following questions in relation to this passage from john f. kennedy's 1963 civil rights address: what notion does kennedy seek to reinvent in this passage? why is it necessary for this notion to change? what long-term result does kennedy expect to see through the reinventing of this notion?

"one hundred years of delay have passed since president lincoln freed the slaves, yet their heirs, their grandsons, are not fully free. they are not yet freed from the bonds of injustice. they are not yet freed from social and economic oppression.