Why is Barcelona vs Real Madrid called El Clasico?

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4. What is the history of El Clasico?
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6. Is Barcelona better than Madrid?
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2. #rivalry
3. #madrid
4. #clasico
5. #parag
6. #barcelona
7. #because
8. #english
9. #simply
10. #classic
11. #between
12. #match
13. #answer
14. #stands
15. #football
16. #these
17. #whenever
18. #teams
19. #given