alluding

1).what is the poet alluding  to in these lines ?
A pregnat girl that got ripe while slavery.
2)Explain the referense to the MASON-DIXION?
The line was the alluding between North and South.
3)What Is the poet reffering to in  the line ,"when the rainbow's enuf"?
She refering the book that "the color girls ,when the rainbow's not enuff"comitted suiced.
    By:Talib Kweli