what is the difference between the number of affiliates galavision has and the number of affiliates azteca 13 has?
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col : network name | flagship | programming type | owner | affiliates row 1 : canal de las estrellas | xew 2 | soap operas, retro movies and sports | televisa | 1 row 2 : canal 5 | xhgc 5 | cartoons, movies, and series | televisa | 1 row 3 : azteca 7 | xhimt 7 | sports, series, and movies | tv azteca | 1 row 4 : galavisión | xeq 9 | retro programming and sports | televisa | 1 row 5 : once tv | xeipn 11 | educational and cultural | national polytechnic institute | 1 row 6 : azteca 13 | xhdf 13 | news, soap operas, and sports | tv azteca | 1 row 7 : independent |  | varies | independent | 2
what is the difference between the number of affiliates galavision has and the number of affiliates azteca 13 has?
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
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