A Case of Teachers

I was taught by a man called Hughes
    but his first name wasn't Ted.

I was taught by a man called Harrison
    but his first name wasn't Tony.

I was taught by a man called Mitchell
    but his first name wasn't Adrian.

I was taught by a man called Shaw
    but his first names weren't George Bernard.

I was taught by a man called Stevens
    but his first name wasn't Wallace.

I was taught by a man called Kirk
    but his first name wasn't James T.

Now wouldn't they all like to know
    which ones I actually learned from?