I want to know the answer to the following question:
When did the first radio stations appear?
All the background I'm provided with is that "The first commercial broadcasting radio stations appeared in 1922: first WIP, then owned by Gimbel's department store, on March 17, followed the same year by WFIL, WOO, WCAU and WDAS.". Is that enough to answer the question?
Answer: yes