You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
In this task, you need to identify the sentiment of the given sentence as one of 'positive' or 'negative.

tormented by the quickened blood of roots
Solution: negative
Why? There is an expression of sadness in this poem text, hence it is negative.

New input: afar the melancholy thunder moaned,
Solution:
negative