Question: Which famous football player who has played in Kopparvallen participated at the 1974 and 1978 FIFA world cups with Sweden?
{'answer': 'Conny Torstensson', 'supporting_facts': [['Kopparvallen', 0], ['Kopparvallen', 3], ['Conny Torstensson', 0], ['Conny Torstensson', 1]]}