Fix bug in sentiment calculation

Signed-off-by: Itai Koren <itkoren@gmail.com>
Fix Error Message

Signed-off-by: Itai Koren <itkoren@gmail.com>
Fix Error Message

Signed-off-by: Itai Koren <itkoren@gmail.com>
Unfix error

Signed-off-by: Itai Koren <itkoren@gmail.com>
Fix Error Message

Signed-off-by: Itai Koren <itkoren@gmail.com>