TASK DEFINITION: In this task you are given a tweet. You must judge whether the author of the tweet is sad or not. Label the instances as "Sad" or "Not sad" based on your judgment. You can get help from hashtags and emojis, but you should not judge only based on them, and should pay attention to tweet's text as well.
PROBLEM: We're in contained depression. Only new economic engine is #Sustainability, say Joel @makower + @markmykleby @ #VERGEcon. #NewGrandStrategy

SOLUTION: Sad

PROBLEM: Thank God for grace 

SOLUTION: Not sad

PROBLEM: My dog wouldn't stop barking so now I'm up at eight am with a raging headache

SOLUTION:
Sad