TASK DEFINITION: In this task, you are given a text from tweets. Your task is to classify given tweet text into two categories: 1) positive, and 2) negative based on its content.
PROBLEM: @b0j3 thats why  the question mark. Iam not sure about the concrete implementation but the idea is ok 

SOLUTION: positive

PROBLEM: As we speak, GM is filing for bankruptcy. GM now stands for government motors. 

SOLUTION: negative

PROBLEM: still has more chores to do. 

SOLUTION:
negative