Stanford Parser

Your query

What would be the best regular expression for tokenizing an

Tagging

What/WP

would/MD

be/VB

the/DT

best/JJS

regular/JJ

expression/NN

for/IN

tokenizing/NN

an/DT

Parse

(ROOT
  (SBARQ
    (WHNP (WP What))
    (SQ (MD would)
      (VP (VB be)
        (NP
          (NP (DT the) (JJS best) (JJ regular) (NN expression))
          (PP (IN for)
            (NP (NN tokenizing) (DT an))))))))

Universal dependencies

nsubj(expression-7, What-1)
aux(expression-7, would-2)
cop(expression-7, be-3)
det(expression-7, the-4)
amod(expression-7, best-5)
amod(expression-7, regular-6)
root(ROOT-0, expression-7)
case(tokenizing-9, for-8)
nmod(expression-7, tokenizing-9)
dep(tokenizing-9, an-10)

Universal dependencies, enhanced

nsubj(expression-7, What-1)
aux(expression-7, would-2)
cop(expression-7, be-3)
det(expression-7, the-4)
amod(expression-7, best-5)
amod(expression-7, regular-6)
root(ROOT-0, expression-7)
case(tokenizing-9, for-8)
nmod:for(expression-7, tokenizing-9)
dep(tokenizing-9, an-10)

Statistics

Tokens: 10
Time: 0.056 s
Parser: englishPCFG.ser.gz