The Black Cane Society is named after the Black Cane award which is given annually by the law students to the professor who is voted to be the most outstanding classroom teacher.
( ( The ( Black ( Cane Society ) ) ) ( ( is ( named ( after ( ( the ( Black ( Cane award ) ) ) ( which ( is ( ( ( given annually ) ( by ( the ( law students ) ) ) ) ( to ( ( the professor ) ( who ( is ( voted ( to ( be ( the ( ( most outstanding ) ( classroom teacher ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NNP Black) (NNP Cane) (NNP Society)) (VP (VBZ is) (VP (VBN named) (PP (IN after) (NP (NP (DT the) (NNP Black) (NNP Cane) (NN award)) (SBAR (WHNP (WDT which)) (S (VP (VBZ is) (VP (VBN given) (ADVP (RB annually)) (PP (IN by) (NP (DT the) (NN law) (NNS students))) (PP (TO to) (NP (NP (DT the) (NN professor)) (SBAR (WHNP (WP who)) (S (VP (VBZ is) (VP (VBN voted) (S (VP (TO to) (VP (VB be) (NP (DT the) (ADJP (RBS most) (JJ outstanding)) (NN classroom) (NN teacher))))))))))))))))))) (. .)))
No professor has ever won the Black Cane award more than once.  
( ( No professor ) ( ( ( has ever ) ( ( won ( the ( Black ( Cane award ) ) ) ) ( more ( than once ) ) ) ) . ) )
(ROOT (S (NP (DT No) (NN professor)) (VP (VBZ has) (ADVP (RB ever)) (VP (VBN won) (NP (DT the) (NNP Black) (NNP Cane) (NN award)) (ADVP (RBR more) (IN than) (RB once)))) (. .)))