Task: Question Generation
Input (English): As of June 2012[update], Pakistan's electricity problems were so severe that violent riots were taking place across Punjab. According to protesters, load shedding was depriving the cities of electricity 20–22 hours a day, causing businesses to go bust and making living extremely hard. Gujranwala, Toba Tek Singh, Faisalabad, Sialkot, Bahawalnagar and communities across Khanewal District saw widespread rioting and violence on Sunday 17 June 2012, with the houses of several members of parliament being attacked as well as the offices of regional energy suppliers Fesco, Gepco and Mepco being ransacked or attacked.
Output (English): Which energy companies' offices were attacked by rioters?