( ( If ( you ( try ( to ( ( dig down ) ( in ( the corner ) ) ) ) ) ) ) ( ( ( you ( may ( leave ( ( a ( little piece ) ) ( of ( ( nail , ) ( which ( we ( call ( a ( nail spicule ) ) ) ) ) ) ) ) ) ) ) , ) ( ( As ( that ( grows out ) ) ) ( it ( ( could ( ( ( be ( like ( a needle ) ) ) and ) ( puncture ( the skin ) ) ) ) . ) ) ) ) )
(ROOT (S (SBAR (IN If) (S (NP (PRP you)) (VP (VBP try) (S (VP (TO to) (VP (VB dig) (PRT (RP down)) (PP (IN in) (NP (DT the) (NN corner))))))))) (PRN (S (NP (PRP you)) (VP (MD may) (VP (VB leave) (NP (NP (DT a) (JJ little) (NN piece)) (PP (IN of) (NP (NP (NN nail)) (, ,) (SBAR (WHNP (WDT which)) (S (NP (PRP we)) (VP (VBP call) (NP (DT a) (NN nail) (NN spicule))))))))))) (, ,)) (SBAR (IN As) (S (NP (DT that)) (VP (VBZ grows) (PRT (RP out))))) (NP (PRP it)) (VP (MD could) (VP (VP (VB be) (PP (IN like) (NP (DT a) (NN needle)))) (CC and) (VP (VB puncture) (NP (DT the) (NN skin))))) (. .)))
If you try to dig down in the corner you may leave a little piece of nail, which we call a nail spicule, As that grows out it could be like a needle and puncture the skin.
(ROOT (S (NP (NP (DT The) (JJ sharp) (NNS projections)) (SBAR (IN that) (S (NP (JJ specialized) (NNS cells)) (VP (VBP grow))))) (VP (VBP are) (VP (VBN called) (NP (NNS spicules)))) (. .)))