You will be given a definition of a task first, then some input of the task.
In this task, you are given a context paragraph, a question based on that and corresponding answer of a question. Your task is to generate supporting fact/knowledge from context paragraph which helps in answering a given question.

WCNN is an AM station broadcasting on a frequency of 680 kHz and serving the Atlanta-area radio market with a sports radio format. The station is commonly known by the on-air branding as "The Fan". The station formerly broadcast the audio portion of the CNN Headline News channel (hence its current callsign) along with some local news and commercials, a news radio format that the station pioneered in the 1980s and re-appeared on the station later in the station's history. WCNN broadcasts with a power of 50,000 watts during the daytime, and 10,000 watts during nighttime, and is actually licensed to serve North Atlanta, with transmitter and towers located near Norcross, Georgia (in the northeastern Atlanta suburbs). Question: What are the call letters of the sports radio station, also known as "The Fan" that broadcasts from the same building as sister station WNNX, a mainstream rock station? Answer: WCNN
Output:
WCNN is an AM station broadcasting on a frequency of 680 kHz and serving the Atlantaarea radio market with a sports radio format.