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.

Paul Ehrlich said that humanity is a threat to all life. Such great news to start the day. If I could blush I would.
Not sad

Alright Alex and I have party boy neighbors who blast music 
Not sad

@KitchenAidUSA  I spent over $500 on your mixer, yet the dough hook chips in my dough.  I buy a new one and the same thing happens. #unhappy

Sad