adidasí Trefoil logo was introduced in 1972. The three leaves symbolize the Olympic spirit, linking the three continental plates.adidasí Trefoil logo was introduced in 1972. The three leaves symbolize the Olympic spirit, linking the three continental plates.Rules of the Game: Coaches and other officials must remain within the confines of the technical area except in special circumstances, for example, a trainer or doctor entering the field of play, with the refereeís permission, to assess an injured player.The Guinness Book of Records recognizes Sandygate Road stadium in Crosspool, Sheffield, England in as the Oldest Ground in the World. It has been home to Hallam FC since 1860.In 1994, Detroitís Pontiac Silverdome was the first-ever indoor stadium to be used in the World Cup.
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