CAMR is a transition-based, tree-to-graph parser for the Abstract Meaning Representation of a sentence. It is a product of an on-going collaboration between the Chinese Language Processing Group at Brandeis University and cemantix.org

Reference:

• Chuan Wang, Nianwen Xue, and Sameer Pradhan.2015. A transition-based algorithm for AMR parsing. In Proceedings of the 2015 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies, pages 366–375, Denver, Colorado, May–June. Association for Computational Linguistics.

@InProceedings{wang-xue-pradhan:2015:NAACL-HLT,
  author    = {Wang, Chuan  and  Xue, Nianwen  and  Pradhan, Sameer},
  title     = {A Transition-based Algorithm for AMR Parsing},
  booktitle = {Proceedings of the 2015 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies},
  month     = {May--June},
  year      = {2015},
  address   = {Denver, Colorado},
  publisher = {Association for Computational Linguistics},
  pages     = {366--375},
  url       = {http://www.aclweb.org/anthology/N15-1040}
}

• Chuan Wang, Nianwen Xue, and Sameer Pradhan.2015. Boosting Transition-based AMR Parsing with Refined Actions and Auxiliary Analyzers. In Proceedings of the 53rd Annual Meeting of the Association for Computational Linguistics and the 7th International Joint Conference on Natural Language Processing (Short Papers), pages 857-862, Beijing, China, July 26-31, 2015. Association for Computational Linguistics.

@InProceedings{wang-xue-pradhan:2015:ACL-IJCNLP,
  author    = {Wang, Chuan  and  Xue, Nianwen  and  Pradhan, Sameer},
  title     = {Boosting Transition-based AMR Parsing with Refined Actions and Auxiliary Analyzers},
  booktitle = {Proceedings of the 53rd Annual Meeting of the Association for Computational Linguistics and the 7th International Joint Conference on Natural Language Processing (Volume 2: Short Papers)},
  month     = {July},
  year      = {2015},
  address   = {Beijing, China},
  publisher = {Association for Computational Linguistics},
  pages     = {857--862},
  url       = {http://www.aclweb.org/anthology/P15-2141}
}

First download the project:

  git clone https://github.com/Juicechuan/AMRParsing.git

Here we use a modified version of the Stanford CoreNLP python wrapper, Charniak Parser and Stanford CoreNLP toolkit. To setup dependencies, run the following script:

  ./scripts/config.sh

Note: For Mac users, there are some problems when installing the Charniak Parser python module bllipparser. We recommend to use Linux system in order to utilize the Charniak Parser. Also you may need swig to successfully install bllipparser.

The input data format for parsing should be raw document with one sentence per line. ##Preprocessing To preprocess the data, run:

  python amr_parsing.py -m preprocess [input_sentence_file]

This will give you the tokenized sentences(.tok), POS tag and name entity (.prp) and dependency structure (.charniak.parse.dep) (generated by Charniak parser and Stanford Dependency converter). Download the model trained on training set of LDC2013E117 newswire section here. Then use the following command to parse the sentence:

  python amr_parsing.py -m parse --model [model_file] [input_sentence_file] 2>log/error.log

This will give your the parsed AMR file(.parsed) in the same directory of your input sentence file. ##Alignment If you have annotated AMR file, you could first run the preprocessing step:

python amr_parsing.py -m preprocess --amrfmt [input_amr_file]

This will generate a tokenized AMR file (.amr.tok) (which has :tok tag in the comments). Then you can run the following command to get the aligned AMR file(.aligned)

./scripts/jamr_align.sh [input_amr_tok_file]

Note: We use JAMR to get the alignment between sentence and its AMR annotation. You need to download and set up JAMR.