    To the best of our recollection, this may be the only instance in which the origin of an expression has been traced to a statue.
( ( To ( ( the best ) ( of ( our recollection ) ) ) ) ( , ( this ( ( may ( be ( ( the ( only instance ) ) ( ( in which ) ( ( ( the origin ) ( of ( an expression ) ) ) ( has ( been ( traced ( to ( a statue ) ) ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (TO To) (NP (NP (DT the) (JJS best)) (PP (IN of) (NP (PRP$ our) (NN recollection))))) (, ,) (NP (DT this)) (VP (MD may) (VP (VB be) (NP (NP (DT the) (JJ only) (NN instance)) (SBAR (WHPP (IN in) (WHNP (WDT which))) (S (NP (NP (DT the) (NN origin)) (PP (IN of) (NP (DT an) (NN expression)))) (VP (VBZ has) (VP (VBN been) (VP (VBN traced) (PP (TO to) (NP (DT a) (NN statue))))))))))) (. .)))
As far as we can recall, this might be the only case in which a statue inspired the creation of an expression. 
( ( As ( far ( as ( we ( can recall ) ) ) ) ) ( , ( this ( ( might ( be ( ( the ( only case ) ) ( ( in which ) ( ( a statue ) ( inspired ( ( the creation ) ( of ( an expression ) ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (ADVP (RB As) (RB far) (SBAR (IN as) (S (NP (PRP we)) (VP (MD can) (VP (VB recall)))))) (, ,) (NP (DT this)) (VP (MD might) (VP (VB be) (NP (NP (DT the) (JJ only) (NN case)) (SBAR (WHPP (IN in) (WHNP (WDT which))) (S (NP (DT a) (NN statue)) (VP (VBD inspired) (NP (NP (DT the) (NN creation)) (PP (IN of) (NP (DT an) (NN expression)))))))))) (. .)))