'Use MaltParser to parse multiple sentences.
Takes a list of sentences, where each sentence is a list of words.
Each sentence will be automatically tagged with this
MaltParser instance\'s tagger.
:param sentences: Input sentences to parse
:type sentence: list(list(str))
:return: iter(DependencyGraph)'

def parse_sents(self, sentences, verbose=False, top_relation_label=u'null'):

    tagged_sentences = (self.tagger(sentence) for sentence in sentences)
    return self.parse_tagged_sents(tagged_sentences, verbose, top_relation_label=top_relation_label)
