pmb2tsv

pmb2tsv is a collection of scripts to convert data from the Parallel Meaning Bank (PMB) into column-based (.tsv) files. It also extracts the raw and tokenized data in the form of .tok.iob files and the DRSs in the form of .drs.clf files.

Input Data

Please download the PMB 3.0.0/4.0.0 and extract the directory pmb-3.0.0/pmb-4.0.0 into a data directory in the root directory of this repository (or symlink it).

Software Dependencies

Scripts to convert the files are mostly found in this repository; however, the following software needs to be present on the system:

• Python 3 – the python3 executable should be on your $PATH.
• Produce – the produce executable should be on your $PATH.
• SWI-Prolog 7 or higher – the swipl executable should be on your $PATH. Tested with version 8.4.2.
• GNU Parallel – the parallel executable should be on your $PATH.

Outputs

The data is extracted in four different formats:

• .tok.iob: Tokenization information in character-level BIO format
• .parse.tags: CCG derivations with tags in Prolog syntax
• .drs.clf: DRSs in clause format

Individual per-token annotation layers are extracted to files with these extensions:

• .toknum (token number)
• .tok (token form)
• .lemma (lemma)
• .sem (semantic tag)
• .wordnet (WordNet sense)
• .dep (dependency head)
• .frag (DRS fragment)

All of these are integrated into TSV files (the columns are in the above order):

• .tsv

The output file names before the extension contain the following information, indicating which data is in each file:

• PMB version (3.0.0 or 4.0.0)
• language (en, de, it, or nl)
• status (gold, silver, or bronze)
• part (p00, p01, ..., or p99) or portion (train, dev, test, or eval). The latter are concatenated together from the former according to the division in the PMB README (different for 3.0.0 and 4.0.0).

Usage

Use the produce command to produce the file(s) with the information you need. For example, to extract the .drs.clf file for the PMB 4.0.0 English gold part 00:

produce out/pmb-4.0.0-en-gold-p00.drs.clf

To produce train, dev, and test data in TSV format for all languages:

produce out/pmb-4.0.0-{en,de,it,nl}-gold-{train,dev,test}.tsv

There are also shorthands to extract all data for a given version and status. For example:

produce gold-4.0.0
produce silver-4.0.0
produce bronze-4.0.0

Limitations

For a small number of CCG derivations, especially some that are not fully corrected, dependency extraction will fail. The corresponding columns will be empty/missing. In extremely rare cases a dependency non-tree (a cyclic graph) may be extracted.

Publications and Experiments

For details on the conversion from CCG derivations to dependency trees, see

Kilian Evang (2020): Configurable Dependency Tree Extraction from CCG
Derivations. Proceedings of the Universal Dependencies Workshop.

To reproduce the experiments from that paper, checkout out the evang-2020-configurable tag and run:

produce pmb-3.0.0-{en,de,it,nl}-gold-{p00,p01}.eval