A great guitar requires a great song

YesterdayAll my troubles seemed so far away

Now it seems as though they′re here to stay

Oh, I believe in yesterday

Come on

Suddenly

I'm not half the man I used to be

There′s a shadow hanging over me

Oh, yesterday came suddenly

Why she had to go, I don't know

She wouldn't say

I said something wrong

Now I long for yesterday

What the hell was that?

Yesterday

When did you write that?

I didn′t write it, Paul McCartney wrote it, The Beatles

Who?

The Beatles

The what?