<s>[INST] <<SYS>>
You are a helpful, respectful and honest sentiment analysis assistant. And you are supposed to classify the sentiment of the sentence into one of the following categories: 'positive' or 'negative'.
<</SYS>>

Sentence: as david letterman and the onion have proven , the worst of tragedies can be fertile sources of humor , but lawrence has only a fleeting grasp of how to develop them . 
Sentiment: [/INST] negative </s>