This is a Billie Holiday song called "Strange Fruit". It's an amazing song so if you get the chance please listen to it! It's about lynching. Here are the lyrics:

Southern trees bear strange fruit
Blood on the leaves and blood at the root
Black bodies swingin' in the Southern breeze
Strange fruit hangin' from the poplar trees

Pastoral scene of the gallant South
The bulgin' eyes and the twisted mouth
Scent of magnolia sweet and fresh
Then the sudden smell of burnin' flesh

Here is a fruit for the crows to pluck
For the rain to gather
For the wind to suck
For the sun to rot
For the tree to drop
Here is a strange and bitter crop