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There is no B minor 7 scale.
B minor 7 is only a chord.
If you still want to know what play over a Bm7 chord then i suggest you play one of the following scales:
B minor, B minor pentatonic, B Dorian
B minor contains F# and C#.
There is no such thing as B major. There is B minor and B flat major. The subdominant triad of B minor ( I'm pretty sure) is E minor.
John B. Minor died in 1895.
John B. Minor was born in 1813.