Complex sentence: From 1991 to 1993, George Carlin replaced Starr as both the storyteller and as Mr. Conductor for the US, and continued to narrate the stories until 1995.
Split into simpler sentences: From 1991 to 1993 George Carlin replaced Starr as both the storyteller and as Mr. Conductor for the American version of the show. He continued to narrate the stories until 1995.