Task: Question Answering
Input (English): . We address various different challenges: dialogue act annotated data is not available for customer service on Twitter, the task of dialogue act annotation is subjective, existing taxonomies do not capture the fine-grained information we believe is valuable to our task, and tweets, although concise in nature, often consist of overlapping dialogue acts to characterize their full intent. 
 Question: Which dialogue acts are more suited to the twitter domain?
Output (English): overlapping dialogue acts