 Using  emotional tone of user publications as a proxy for his emotional state, we uncover relationships between state changes and interactions he has in a given community.
<fluency>  Using  emotional tone of user publications as a proxy for his emotional state, we uncover relationships between state changes and interactions he has in a given community.
 Using the emotional tone of user publications as a proxy for his emotional state, we uncover relationships between state changes and interactions he has in a given community.