Question: Who presented the first this is your life?

context: This Is Your Life was an American reality documentary series broadcast on NBC radio from 1948 to 1952, and on NBC television from 1952 to 1961. It was originally hosted by its creator and producer Ralph Edwards. In the program, the host would surprise guests and then take them through a retrospective of their lives in front of an audience, including appearances by colleagues, friends, and family. Edwards revived the show in 1971–1972, and Joseph Campanella hosted a version in 1983. Edwards returned for some specials in the late 1980s, before his death in 2005.
question: Who was the presenter on the original NBC radio show This Is Your Life?
short_answers: Ralph Edwards
context: No context provided
question: What company first aired presentations of the original radio show This Is Your Life?
short_answers: NBC

Answer: This Is Your Life was an American reality documentary series broadcast on NBC radio from 1948 to 1952, and on NBC television from 1952 to 1961. It was originally hosted by its creator and producer Ralph Edwards.