Question: In which prestigious venues did the Pakistani female singer performed who's some songs were written by Riaz-Ur-Rehman Saghar?
{'answer': 'Royal Albert Hall', 'supporting_facts': [['Riaz ur Rehman Saghar', 0], ['Riaz ur Rehman Saghar', 2], ['Hadiqa Kiani', 0], ['Hadiqa Kiani', 1]]}