解析自然语言处理（NLP）中的句子

Question

由于我是机器学习的初学者，所以我很困惑地解析给定的句子。 “我在河的左边。” 尝试了很多，但真的无法得到确切的解决方案。

Answer 1

有差异的语言解析器可用，但它取决于您的要求是什么。看看someof这个上手

1. http://www.nltk.org/howto/parse.html
2. http://nlp.stanford.edu/software/lex-parser.shtml

谷歌sentence parser，你会得到大名单

这里是斯坦福解析器结果：

NLP> I am in the left side of river. 
Sentence #1 (9 tokens): 
I am in the left side of river. 
[Text=I CharacterOffsetBegin=0 CharacterOffsetEnd=1 PartOfSpeech=PRP Lemma=I NamedEntityTag=O] [Text=am CharacterOffsetBegin=2 CharacterOffsetEnd=4 PartOfSpeech=VBP Lemma=be NamedEntityTag=O] [Text=in CharacterOffsetBegin=5 CharacterOffsetEnd=7 PartOfSpeech=IN Lemma=in NamedEntityTag=O] [Text=the CharacterOffsetBegin=8 CharacterOffsetEnd=11 PartOfSpeech=DT Lemma=the NamedEntityTag=O] [Text=left CharacterOffsetBegin=12 CharacterOffsetEnd=16 PartOfSpeech=JJ Lemma=left NamedEntityTag=O] [Text=side CharacterOffsetBegin=17 CharacterOffsetEnd=21 PartOfSpeech=NN Lemma=side NamedEntityTag=O] [Text=of CharacterOffsetBegin=22 CharacterOffsetEnd=24 PartOfSpeech=IN Lemma=of NamedEntityTag=O] [Text=river CharacterOffsetBegin=25 CharacterOffsetEnd=30 PartOfSpeech=NN Lemma=river NamedEntityTag=O] [Text=. CharacterOffsetBegin=30 CharacterOffsetEnd=31 PartOfSpeech=. Lemma=. NamedEntityTag=O] 
(ROOT 
    (S 
    (NP (PRP I)) 
    (VP (VBP am) 
     (PP (IN in) 
     (NP 
      (NP (DT the) (JJ left) (NN side)) 
      (PP (IN of) 
      (NP (NN river)))))) 
    (. .))) 

root(ROOT-0, am-2) 
nsubj(am-2, I-1) 
det(side-6, the-4) 
amod(side-6, left-5) 
prep_in(am-2, side-6) 
prep_of(side-6, river-8) 

nltk解析器：

>>> nltk.parse.chart.demo(3, print_times=False, trace=0, 
...      sent='I saw John with a dog', numparses=2) 
* Sentence: 
I saw John with a dog 
['I', 'saw', 'John', 'with', 'a', 'dog'] 

* Strategy: Bottom-up left-corner 

Nr edges in chart: 36 
(S 
    (NP I) 
    (VP (VP (Verb saw) (NP John)) (PP with (NP (Det a) (Noun dog))))) 
(S 
    (NP I) 
    (VP (Verb saw) (NP (NP John) (PP with (NP (Det a) (Noun dog))))))