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: Can't sleep. Again. Ugh.  Question: is it a positive tweet?

SOLUTION: no

PROBLEM: Tweet: new ps4 It seems like the Playstation 4 release date has varied from 2010, 2011, and 2014. not been anouced yet  Question: is it a negative tweet?

SOLUTION: yes

PROBLEM: Tweet: probably the first iPhone 3GS in Australia. [Link] its not mine.  Question: is it a positive tweet?

SOLUTION:
no