|Network name|Flagship|Programming type|Owner|Affiliates|
|---|---|---|---|---|
|Canal de las Estrellas|XEW 2|soap operas, retro movies and sports|Televisa|1|
|Canal 5|XHGC 5|cartoons, movies, and series|Televisa|1|
|Azteca 7|XHIMT 7|sports, series, and movies|TV Azteca|1|
|Galavisión|XEQ 9|retro programming and sports|Televisa|1|
|Once TV|XEIPN 11|educational and cultural|National Polytechnic Institute|1|
|Azteca 13|XHDF 13|news, soap operas, and sports|TV Azteca|1|
|Independent||varies|Independent|2|

Question: what is the difference between the number of affiliates galavision has and the number of affiliates azteca 13 has?
Answer: 0