Before revision:  Using natural language processing techniques and machine learning based algorithms, we annotated each public tweet with seventeen latent semantic attributes, including : 1 ) ten binary attributes indicating the tweet's relevance or irrelevance to  ten detected topics,
After revision:  Using natural language processing techniques and machine learning based algorithms, we annotated each public tweet with seventeen latent semantic attributes, including a ) ten binary attributes indicating the tweet's relevance or irrelevance to ten detected topics,