Who wrote the most Beatles songs?

Related questions

1. How many #1 hits do the Beatles have?
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5. Who is still alive from the Beatles?
6. What were the Beatles number one hits?
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8. How many Beatles songs did George Harrison write?
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Tags

1. #starr
2. #recorded
3. #ringo
4. #george
5. #mccartney
6. #songs
7. #lennon
8. #according
9. #beatles
10. #research
11. #wrote
12. #harrison