Detailed Instructions: 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: is sad that he has to go to work and will miss the Roland Garros men's final between Roger Federer and Robin Soderling  Question: is it a negative tweet?
Solution:
yes