Need help understanding this poem

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I have an essay due tommorow on this poem called Laventille by Derek Walcott and I don't understand it what so ever :(. I was wondering if someone on here might be able to help me. The link to the poem is: http://shs.westport.k12.ct.us/chia/caribbean/laventille.htm Tell what you guys think it's about. Any help would be greatly appreciated :D