sentences:  From there, the material was transported to Fraas' institution, the Royal Natural History Collection in Stuttgart, Germany.Fraas described two species in the badly known genus ""Gigantosaurus""; "G. robustus" and "G. africanus" (today "Janenschia robusta" and "Tornieria africana", respectively).The Berlin's Natural History Museum excavated at Tendaguru hill and in the surroundings for four years.