Simplify the following text for a Grade 7 native English-speaking person.
Original: Hassium was first synthesized in 1984 by a German research team led by Peter Armbruster and Gottfried MÃ 1\/4 nzenberg at the Institute for Heavy Ion Research ( Gesellschaft fÃ 1\/4 r Schwerionenforschung ) in Darmstadt .
Simplified: It was made at the Gesellschaft fÃ 1\/4 r Schwerionenforschung ( GSI ) in Darmstadt , Germany . The team that made darmstadtium was led by Peter Armbruster and Gottfried MÃ 1\/4 nzenberg .