Complex sentence: Gustavo Javier Bartelt (born 2 September 1974 in Buenos Aires) is an Argentine footballer who played for All Boys, CA Lanús, Roma, Aston Villa (on loan from Roma), Rayo, Gimnasia La Plata, CA Talleres and Gimnasia de Jujuy.
Split into simpler sentences: Gustavo Javier Bartelt (born 2 September 1974 in Buenos Aires) is an Argentine footballer. He played for All Boys, CA Lanús, Roma, Aston Villa (on loan from Roma), Rayo, Gimnasia La Plata, CA Talleres and Gimnasia de Jujuy.