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: @ATTCares why do I have 2 wait 48 hours to call YOU back to cancel an order I JUST placed after already spending 2 hours on the phone?! 

SOLUTION: Sad

PROBLEM: @theflabar It's a #foggy and #dark morning here - so #filter this time.  For #lighting purposes. :)

SOLUTION: Sad

PROBLEM: Please stop ruining my depressing memes with your positivity and optimism

SOLUTION:
Sad