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: I got to ride with and witness Amanda Coker break a 77 year old bicycling world record. Awesome athlete!  #amandacoker #tdf #relentless

SOLUTION: Not sad

PROBLEM: ok yes I get it as much as the next guy -- bikes blues &amp; bbq is frustrating &amp; loud!!! but these ppl are traveling from all over to come --

SOLUTION:
Not sad