Note that the Stanford SA system pays particular attention to sentence structure due to its "deep" architecture that adds to the model the feature of being sensitive to word ordering <cite>(Socher et al., 2013)</cite> . In future work, we will verify this by comparing these results to other high performing English SA tools (see for example Abbasi et al. (2014) In sum, one of the major challenges of this approach seems to be the use of Arabic dialects in social media, such as Twitter.