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: @ElectraHotels very very disappointed from the level of service so far. No concierge service,No housekeeping,No room service #unhappy

SOLUTION: Sad

PROBLEM: Wrinkles should merely hide where frown have been.  - Mark Twain

SOLUTION: Not sad

PROBLEM: Brown envelopes can induce panic. #posttruth

SOLUTION:
Sad