TASK DEFINITION: In this task, you are given a text from tweets and a boolean question whether this tweet has positive sentiment or negative sentiment. Your task is to generate answer "yes" when the tweet has that particular sentiment, otherwise generate answer "no".
PROBLEM: Tweet: @JFoundation Thx for the rather lovely followfriday - ask away, I'm friendly (mostly) ;) Whatever you feel you need to know!  Question: is it a positive tweet?

SOLUTION: yes

PROBLEM: Tweet: Wish I was back in Michigan for the summer  I miss the warm summer nights and the sound of absolutely nothing Question: is it a negative tweet?

SOLUTION: yes

PROBLEM: Tweet: @GrosenFriis Okay - sounds great!  It might be useful for an international project I'm working on. Question: is it a negative tweet?

SOLUTION:
no