小编Mar*_*elo的帖子

我正在使用NLTK和Maltparser从自然语言的句子中提取依赖关系.我用这段代码做了一些使用Stanford解析器的实验:

sentence =  '''I shot an elephant in my pajamas'''
os.popen("echo '"+sentence+"' > ~/stanfordtemp.txt")
parser_out = os.popen("/usr/local/Cellar/stanford-parser/2.0.3/bin/lexparser.sh ~/stanfordtemp.txt").readlines()

for i, tag in enumerate(parser_out):
    if len(tag.strip()) > 0 and tag.strip()[0] == '(':
        parse = " ".join(tag.strip())
        print i, "Parse: ", tag
    elif len(tag.strip()) > 0:
        print i, "Typed dependencies: ", tag 
bracketed_parse = " ".join( [tag.strip() for tag in parser_out if len(tag.strip()) > 0 and tag.strip()[0] == "("] )
print bracketed_parse

并得到了这个好结果:

Parsing [sent. 1 len. 7]: I shot an elephant …

我有一个rdf文件,例如:

<?xml version="1.0"?>
<rdf:RDF
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
xmlns:dbp="http://dbpedia.org/ontology/"
xmlns:dbprop="http://dbpedia.org/property/"
xmlns:foaf="http://xmlns.com/foaf/0.1/">
    <rdf:Description rdf:about="http://dbpedia.org/page/Johann_Sebastian_Bach">
      <dbp:birthDate>1685-03-21</dbp:birthDate>
      <dbp:deathDate>1750-07-28</dbp:deathDate>
      <dbp:birthPlace>Eisenach</dbp:birthPlace>
      <dbp:deathPlace>Leipzig</dbp:deathPlace>
      <dbprop:shortDescription>German composer and organist</dbprop:shortDescription>
      <foaf:name>Johann Sebastian Bach</foaf:name>
      <rdf:type rdf:resource="http://dbpedia.org/class/yago/GermanComposers"/>
      <rdf:type rdf:resource="http://xmlns.com/foaf/0.1/Person"/>
    </rdf:Description>
</rdf:RDF> 

而且我只想提取这个文件的文本部分,即在这种情况下我的输出是:

output_ tex = "Johann Sebastian Bach, German composer and organist,1685-03-21, 1750-07-28, Eisenach, Leipzig"

如何使用RDFlib获得此结果？