Complex sentence: Rumors exist from the early 1930s that Nils had relationships with Swedish director Mauritz Stiller and Swedish writer Hjalmar Bergman and with male colleagues, according to some sources, had an affair with Johnny Mack Brown.
Split into simpler sentences: Rumors exist from the early 1930s that Nils had relationships with Swedish director Mauritz Stiller and Swedish writer Hjalmar Bergman and with male colleagues. According to some sources, had an affair with Johnny Mack Brown.