Task: Question Answering
Input (English): Context: I today upgraded as a premium member . I also bought 100 referrals today . I also bought 50 referrals yesterday and 50 referrals the day before yesterday . And I also bought 5 referrals on 11 Sept 2008 . 
Question: What happened after you purchased the referrals ?
Output (English): I got better ad placement and more traffic on my site.