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.

Q: @MendipHillsAONB do we think the swallows and swifts have gone? Photo'd 3 nights ago, not seen since. #sad #Autumn

A: Sad
****
Q: @AlaskaAir as a long time Gold &amp; near Million mile member just had a terrible customer service experience #disappointing

A: Sad
****
Q: Because of 'failure of delivery on time', a customer has to pay 16K rupees more! - Not good @tiagotatamotors @TataMotors #unhappy

A:
Sad
****