Triple extraction from a sentance

Question

I have this parsed text in this format, I got it by using Standford nlp.

   (ROOT
  (S
    (NP (DT A) (NN passenger) (NN plane))
    (VP (VBZ has)
      (VP (VBD crashed)
        (ADVP (RB shortly))
        (PP (IN after)
          (NP
            (NP (NN take-off))
            (PP (IN from)
              (NP (NNP Kyrgyzstan) (`` `) (NNP scapital) (, ,) (NNP Bishkek)))))
        (, ,)
        (VP (VBG killing)
          (NP
            (NP (DT a) (JJ large) (NN number))
            (PP (IN of)
              (NP
                (NP (DT those))
                (PP (IN on)
                  (NP (NN board)))))))))
    (. .)))

det(plane-3, A-1)
nn(plane-3, passenger-2)
nsubj(crashed-5, plane-3)
aux(crashed-5, has-4)
root(ROOT-0, crashed-5)
advmod(crashed-5, shortly-6)
prep_after(crashed-5, take-off-8)
nn(Bishkek-14, Kyrgyzstan-10)
nn(Bishkek-14, scapital-12)
prep_from(take-off-8, Bishkek-14)
dep(crashed-5, killing-16)
det(number-19, a-17)
amod(number-19, large-18)
dobj(killing-16, number-19)
prep_of(number-19, those-21)
prep_on(those-21, board-23) 

I am trying to construct an RDF graph and I need a tool or a library to extract triplet (subject,object,predicate) from it.

Answer 1

You can use CoreNLP's OpenIE module to extract triplets visit here :

https://nlp.stanford.edu/software/openie.html

to know more. You can further use those relationship triplets to create RDF graph.