Complex sentence: Torsten Billman's cousin on his mother's side, Nils Svahn (1890-1936), who was a cartoonist at Social-Demokraten in Stockholm, had during Torsten's visit in the autumn of 1929, explained a little about the woodcut for Torsten.
Split into simpler sentences: Torsten Billman's cousin on his mother's side, Nils Svahn (1890-1936), who was a cartoonist at Social-Demokraten in Stockholm. During Torsten's visit in Stockholm in the autumn of 1929, Nils explained a little about the woodcut for Torsten.