Remove the spaces from the following sentence: When he was about ten years old his parents tried to find a solution to his continual health problems by sending him to Cauer Academy in Charlottenburg, a district of Berlin which was not incorporated into the city until 1920.
WhenhewasabouttenyearsoldhisparentstriedtofindasolutiontohiscontinualhealthproblemsbysendinghimtoCauerAcademyinCharlottenburg,adistrictofBerlinwhichwasnotincorporatedintothecityuntil1920.