ACL 2019 Submission ***. Confidential Review Copy. DO NOT DISTRIBUTE.

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Instructions for ACL 2019 Proceedings

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Anonymous ACL submission

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Abstract

012This document contains the instructions for
preparing a camera-ready manuscript for theproceedings of ACL 2019. The document itself conforms to its own specifications, and istherefore an example of what your manuscript
should look like. These instructions should be
used for both papers submitted for review andfor final versions of accepted papers. Authors
are asked to conform to all the directions reported in this document.

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publication in its proceedings. All authors are required to adhere to these specifications. Authors
are required to provide a Portable Document Format (PDF) version of their papers. The proceedings are designed for printing on A4 paper.

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General Instructions

Manuscripts must be in two-column format. Exceptions to the two-column format include the title, authors’ names and complete addresses, whichmust be centered at the top of the first page, andany full-width figures or tables (see the guidelines
in Subsection 3.6). Type single-spaced. Start
all pages directly under the top margin. See theguidelines later regarding formatting the first page.
The manuscript should be printed single-sided andits length should not exceed the maximum page
limit described in Section 5. Pages are numberedfor initial submission. However, do not number
the pages in the camera-ready version.
By uncommenting \aclfinalcopy at the top of
this document, it will compile to produce an example of the camera-ready formatting; by leaving it
commented out, the document will be anonymized
for initial submission. When you first create
your submission on softconf, please fill in yoursubmitted paper ID where *** appears in the\def\aclpaperid{***} definition at the top.
The review process is double-blind, so do notinclude any author information (names, addresses)
when submitting a paper for review. However, you
should maintain space for names and addresses sothat they will fit in the final (accepted) version.
The ACL 2019 LATEX style will create a titlebox
space of 2.5in for you when \aclfinalcopy iscommented out.

Credits

This document has been adapted from the instructions for earlier ACL and NAACL proceedings,
including those for NAACL 2019 by Stephanie
Lukin and Alla Roskovskaya, ACL 2018 by Shay
Cohen, Kevin Gimpel, and Wei Lu, NAACL
2018 by Margaret Michell and Stephanie Lukin,2017/2018 (NA)ACL bibtex suggestions from Jason Eisner, ACL 2017 by Dan Gildea and MinYen Kan, NAACL 2017 by Margaret Mitchell,
ACL 2012 by Maggie Li and Michael White, thosefrom ACL 2010 by Jing-Shing Chang and Philipp
Koehn, those for ACL 2008 by JohannaD. Moore,
Simone Teufel, James Allan, and Sadaoki Furui,those for ACL 2005 by Hwee Tou Ng and Kemal
Oflazer, those for ACL 2002 by Eugene Charniak
and Dekang Lin, and earlier ACL and EACL formats. Those versions were written by several people, including John Chen, Henry S. Thompson and
Donald Walker. Additional elements were takenfrom the formatting instructions of the International Joint Conference on Artificial Intelligenceand the Conference on Computer Vision and Pattern Recognition.

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Introduction

3.1

The Ruler

The ACL 2019 style defines a printed ruler whichshould be presented in the version submitted for

The following instructions are directed to authorsof papers submitted to ACL 2019 or accepted for

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where it was created. Moreover, some word processors may generate very large PDF files, where
each page is rendered as an image. Such images
may reproduce poorly. In this case, try alternative
ways to obtain the PDF. One way on some systems
is to install a driver for a postscript printer, send
your document to the printer specifying “Output
to a file”, then convert the file to PDF.
It is of utmost importance to specify the A4 format (21 cm x 29.7 cm) when formatting the paper.
When working with dvips, for instance, one
should specify -t a4. Or using the command\special{papersize=210mm,297mm}
in the latex preamble (directly below the\usepackage commands).
Then using
dvipdf and/or pdflatex which would makeit easier for some.
Print-outs of the PDF file on A4 paper should
be identical to the hardcopy version. If you cannot
meet the above requirements about the productionof your electronic submission, please contact the
publication chairs as soon as possible.

review. The ruler is provided in order that reviewers may comment on particular lines in thepaper without circumlocution. If you are preparing a document without the provided style files,
please arrange for an equivalent ruler to appear on
the final output pages. The presence or absenceof the ruler should not change the appearance of
any other content on the page. The camera readycopy should not contain a ruler. (LATEX users may
uncomment the \aclfinalcopy command in the
document preamble.)
Reviewers: note that the ruler measurements
do not align well with lines in the paper – thisturns out to be very difficult to do well when thepaper contains many figures and equations, and,
when done, looks ugly. In most cases one would
expect that the approximate location will be adequate, although you can also use fractional references (e.g., the first paragraph on this page ends at
mark 108.5).

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3.2

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ACL provides this description in LATEX2e(acl2019.tex) and PDF format (acl2019.pdf),
along with the LATEX2e style file used to format
it (acl2019.sty) and an ACL bibliography
style (acl natbib.bst) and example bibliography (acl2019.bib).
These files are allavailable at http://acl2019.org/downloads/
acl2019-latex.zip.
We strongly recommend the use of these style files, which havebeen appropriately tailored for the ACL 2019
proceedings.

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Electronically-available resources

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3.4

LayoutFormat manuscripts two columns to a page, in themanner these instructions are formatted. The exact
dimensions for a page on A4 paper are:

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• Left and right margins: 2.5 cm

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• Top margin: 2.5 cm• Bottom margin: 2.5 cm

Format of Electronic Manuscript• Column width: 7.7 cm

For the production of the electronic manuscript
you must use Adobe’s Portable Document Format(PDF). PDF files are usually produced from LATEX
using the pdflatex command. If your version of
LATEX produces Postscript files, you can convert
these into PDF using ps2pdf or dvipdf. On Windows, you can also use Adobe Distiller to generate
PDF.
Please make sure that your PDF file includes
all the necessary fonts (especially tree diagrams,
symbols, and fonts with Asian characters). Whenyou print or create the PDF file, there is usuallyan option in your printer setup to include none,
all or just non-standard fonts. Please make surethat you select the option of including ALL thefonts. Before sending it, test your PDF by printing it from a computer different from the one• Column height: 24.7 cm

3.3

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• Gap between columns: 0.6 cm
Papers should not be submitted on any other paper
size. If you cannot meet the above requirements
about the production of your electronic submission, please contact the publication chairs above
as soon as possible.

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3.5

Fonts

For reasons of uniformity, Adobe’s Times Roman
font should be used. In LATEX2e this is accomplished by putting

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\usepackage{times}\usepackage{latexsym}

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ACL 2019 Submission ***. Confidential Review Copy. DO NOT DISTRIBUTE.

Type of Text
paper title
author names
author affiliation
the word “Abstract”
section titles
subsection titles
document text
captions
abstract text
bibliographyfootnotes

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Font Size
15 pt
12 pt
12 pt
12 pt
12 pt
11 pt
11 pt
10 pt
10 pt
10 pt
9 pt

Command
{\"a}
{\ˆe}
{\‘i}
{\.I}
{\o}
{\’u}
{\aa}

Style
bold
bold
bold
bold
bold

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in the preamble. If Times Roman is unavailable,
use Computer Modern Roman (LATEX2e’s default). Note that the latter is about 10% less dense
than Adobe’s Times Roman font.

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Table 1: Font guide.

3.6

Output
ç
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ñ
ő
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ß

the difference without consulting with you; so it isin your own interest to double-check that the information is consistent.
Abstract: Type the abstract at the beginning of
the first column. The width of the abstract text
should be smaller than the width of the columns
for the text in the body of the paper by about 0.6
cm on each side. Center the word Abstract in a 12
point bold font above the body of the abstract. The
abstract should be a concise summary of the general thesis and conclusions of the paper. It should
be no longer than 200 words. The abstract text
should be in 10 point font.
Text: Begin typing the main body of the text
immediately after the abstract, observing the twocolumn format as shown in the present document.
Do not include page numbers.
Indent: Indent when starting a new paragraph,about 0.4 cm. Use 11 points for text and subsection headings, 12 points for section headings and
15 points for the title.

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Command{\c c}{\u g}{\l}{\˜n}{\H o}{\v r}{\ss}

Table 2: Example commands for accented characters,
to be used in, e.g., BIBTEX names.

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Output
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ê
ı̀
İ
ø
ú
å

The First Page

Center the title, author’s name(s) and affiliation(s)across both columns. Do not use footnotes for affiliations. Do not include the paper ID number
assigned during the submission process. Use thetwo-column format only when you begin the abstract.
Title: Place the title centered at the top of thefirst page, in a 15-point bold font. (For a complete guide to font sizes and styles, see Table 1)
Long titles should be typed on two lines withouta blank line intervening. Approximately, put thetitle at 2.5 cm from the top of the page, followed
by a blank line, then the author’s names(s), andthe affiliation on the following line. Do not use
only initials for given names (middle initials areallowed). Do not format surnames in all capitals(e.g., use “Mitchell” not “MITCHELL”). Do notformat title and section headings in all capitals aswell except for proper names (such as “BLEU”)
that are conventionally in all capitals. The affiliation should contain the author’s complete address,
and if possible, an electronic mail address. Start
the body of the first page 7.5 cm from the top of
the page.
The title, author names and addresses should
be completely identical to those entered to theelectronical paper submission website in order tomaintain the consistency of author information
among all publications of the conference. If they
are different, the publication chairs may resolve

3.7

Sections

Headings: Type and label section and subsection
headings in the style shown on the present document. Use numbered sections (Arabic numerals)
in order to facilitate cross references. Number subsections with the section number and the subsection number separated by a dot, in Arabic numerals. Do not number subsubsections.
Citations: Citations within the text appear inparentheses as (Gusfield, 1997) or, if the author’s name appears in the text itself, as Gusfield (1997). Using the provided LATEX style, theformer is accomplished using \cite and the latterwith \shortcite or \newcite. Collapse multiple citations as in (Gusfield, 1997; Aho and Ullman, 1972); this is accomplished with the provided style using commas within the \cite command, e.g., \cite{Gusfield:97,Aho:72}. Append lowercase letters to the year in cases of ambiguities. Treat double authors as in (Aho and Ull-

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output(Gusfield, 1997)
Gusfield (1997)(1997)

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natbib\citep\citet\citeyearpar

previous ACL style files\cite\newcite\shortcite

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Table 3: Citation commands supported by the style file. The citation style is based on the natbib package andsupports all natbib citation commands. It also supports commands defined in previous ACL style files for compatibility.

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Digital Object Identifiers: As part of our work
to make ACL materials more widely used andcited outside of our discipline, ACL has registeredas a CrossRef member, as a registrant of Digital Object Identifiers (DOIs), the standard for registering permanent URNs for referencing scholarly materials. As of 2017, we are requiring allcamera-ready references to contain the appropriate
DOIs (or as a second resort, the hyperlinked ACL
Anthology Identifier) to all cited works. Thus,
please ensure that you use BibTEX records that
contain DOI or URLs for any of the ACL materials
that you reference. Appropriate records should befound for most materials in the current ACL Anthology at http://aclanthology.info/.
As examples, we cite (Goodman et al., 2016) toshow you how papers with a DOI will appear in
the bibliography. We cite (Harper, 2014) to show
how papers without a DOI but with an ACL Anthology Identifier will appear in the bibliography.
As reviewing will be double-blind, the submitted version of the papers should not include theauthors’ names and affiliations. Furthermore, selfreferences that reveal the author’s identity, e.g.,man, 1972), but write as in (Chandra et al., 1981)
when more than two authors are involved. Collapse multiple citations as in (Gusfield, 1997; Ahoand Ullman, 1972). Also refrain from using fullcitations as sentence constituents.
We suggest that instead of“(Gusfield, 1997) showed that ...”

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you use“Gusfield (1997) showed that ...”
If you are using the provided LATEX and BibTEX
style files, you can use the command \citet(cite in text) to get “author (year)” citations.
You can use the command \citealp (alternative cite without parentheses) to get “author year”
citations (which is useful for using citations withinparentheses, as in Gusfield, 1997).
If the BibTEX file contains DOI fields, the paper title in the references section will appear asa hyperlink to the DOI, using the hyperref LATEX
package. To disable the hyperref package, load
the style file with the nohyperref option:\usepackage[nohyperref]{acl2019}“We previously1997) ...”

Compilation Issues: Some of you might encounter the following error during compilation:“\pdfendlink ended up in different nestinglevel than \pdfstartlink.”
This happens when pdflatex is used
and a citation splits across a page boundary.
To fix this, the style file contains apatch consisting of the following two lines: (1)\RequirePackage{etoolbox} (line 454 inacl2019.sty), and (2) A long line below (line455 in acl2019.sty).
If you still encounter compilation issues evenwith the patch enabled, disable the patch bycommenting the two lines, and then disable thehyperref package (see above), recompile andsee the problematic citation. Next rewrite that
sentence containing the citation. (See, e.g.,
http://tug.org/errors.html)

showed(Gusfield,

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should be avoided. Instead, use citations such as

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“Gusfield (1997) previously showed ... ”
Any preliminary non-archival versions of submitted papers should be listed in the submission
form but not in the review version of the paper.
ACL 2019 reviewers are generally aware that authors may present preliminary versions of theirwork in other venues, but will not be provided thelist of previous presentations from the submission
form.
Please do not use anonymous citations and do
not include when submitting your papers. Papers
that do not conform to these requirements may berejected without review.

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ferred to by asterisks or other symbols.1 Footnotes
should be separated from the text by a line.2

References: Gather the full set of references together under the heading References; place thesection before any Appendices. Arrange the references alphabetically by first author, rather thanby order of occurrence in the text. By using a .bib
file, as in this template, this will be automaticallyhandled for you. See the \bibliography commands near the end for more.
Provide as complete a citation as possible, using
a consistent format, such as the one for Computational Linguistics or the one in the Publication
Manual of the American Psychological Association (American Psychological Association, 1983).
Use of full names for authors rather than initials
is preferred. A list of abbreviations for common computer science journals can be found in
the ACM Computing Reviews (for Computing Machinery, 1983).
The LATEX and BibTEX style files provided
roughly fit the American Psychological Association format, allowing regular citations, short citations and multiple citations as described above.

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• Example citing an arxiv paper: (Rasooli andTetreault, 2015).

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• Example article in journal citation: (Andoand Zhang, 2005).
• Example article in proceedings, with location: (Borschinger and Johnson, 2011).
• Example article in proceedings, without location: (Andrew and Gao, 2007).

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See corresponding .bib file for further details.
Submissions should accurately reference priorand related work, including code and data. If apiece of prior work appeared in multiple venues,
the version that appeared in a refereed, archival
venue should be referenced. If multiple versionsof a piece of prior work exist, the one used by theauthors should be referenced. Authors should not
rely on automated citation indices to provide accurate references for prior and related work.
Appendices: Appendices, if any, directly follow the text and the references (but see above).
Letter them in sequence and provide an informative title: Appendix A. Title of Appendix.

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3.8

Accessibility

In an effort to accommodate people who are colorblind (as well as those printing to paper), grayscalereadability for all accepted papers will be encouraged. Color is not forbidden, but authors should
ensure that tables and figures do not rely solely oncolor to convey critical distinctions. A simple criterion: All curves and points in your figures should
be clearly distinguishable without color.

Translation of non-English Terms

It is also advised to supplement non-English characters and terms with appropriate transliterations
and/or translations since not all readers understandall such characters and terms. Inline transliteration
or translation can be represented in the order of:original-form transliteration “translation”.

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Length of Submission

The ACL 2019 main conference accepts submissions of long papers and short papers. Long papers
may consist of up to eight (8) pages of content plus
unlimited pages for references. Upon acceptance,
final versions of long papers will be given one additional page – up to nine (9) pages of content plus

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3.10

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Graphics

Illustrations: Place figures, tables, and photographs in the paper near where they are first discussed, rather than at the end, if possible. Wideillustrations may run across both columns. Color
illustrations are discouraged, unless you have verified that they will be understandable when printed
in black ink.
Captions: Provide a caption for every illustration; number each one sequentially in the form:“Figure 1. Caption of the Figure.” “Table 1. Caption of the Table.” Type the captions of the figures and tables below the body, using 10 pointtext. Captions should be placed below illustrations. Captions that are one line are centered (seeTable 1). Captions longer than one line are leftaligned (see Table 2). Do not overwrite the default
caption sizes. The acl2019.sty file is compatible
with the caption and subcaption packages; do not
add optional arguments.

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3.9

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Footnotes

Footnotes: Put footnotes at the bottom of the pageand use 9 point font. They may be numbered or re-1
2

5

This is how a footnote should appear.
Note the line separating the footnotes from the text.

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unlimited pages for references – so that reviewers’comments can be taken into account. Short papers
may consist of up to four (4) pages of content, plus
unlimited pages for references. Upon acceptance,
short papers will be given five (5) pages in the proceedings and unlimited pages for references. For
both long and short papers, all illustrations and tables that are part of the main text must be accommodated within these page limits, observing theformatting instructions given in the present document. Papers that do not conform to the specified
length and formatting requirements are subject tobe rejected without review.
ACL 2019 does encourage the submission of
additional material that is relevant to the reviewers but not an integral part of the paper. There are
two such types of material: appendices, which canbe read, and non-readable supplementary materials, often data or code. Do not include this additional material in the same document as your main
paper. Additional material must be submitted as
one or more separate files, and must adhere to thesame anonymity guidelines as the main paper. The
paper must be self-contained: it is optional for reviewers to look at the supplementary material. Papers should not refer, for further detail, to documents, code or data resources that are not available to the reviewers. Refer to Appendix A andAppendix B for further information.
Workshop chairs may have different rules for allowed length and whether supplemental material iswelcome. As always, the respective call for papers
is the authoritative source.

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Rie Kubota Ando and Tong Zhang. 2005. A framework
for learning predictive structures from multiple tasks
and unlabeled data. Journal of Machine Learning
Research, 6:1817–1853.

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Galen Andrew and Jianfeng Gao. 2007. Scalable training of L1-regularized log-linear models. In Proceedings of the 24th International Conference on
Machine Learning, pages 33–40.

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Ashok K. Chandra, Dexter C. Kozen, and Larry J.
Stockmeyer. 1981. Alternation. Journal of the Association for Computing Machinery, 28(1):114–133.

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Association for Computing Machinery. 1983. Computing Reviews, 24(11):503–512.

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Acknowledgments
The acknowledgments should go immediately
before the references. Do not number the acknowledgments section. Do not include thissection when submitting your paper for review.

James Goodman, Andreas Vlachos, and Jason Naradowsky. 2016. Noise reduction and targeted exploration in imitation learning for abstract meaning representation parsing. In Proceedings of the 54th Annual Meeting of the Association for Computational
Linguistics (Volume 1: Long Papers), pages 1–11.
Association for Computational Linguistics.

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Dan Gusfield. 1997. Algorithms on Strings, Trees
and Sequences. Cambridge University Press, Cambridge, UK.

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Mary Harper. 2014. Learning from 26 languages: Program management and science in the babel program.
In Proceedings of COLING 2014, the 25th International Conference on Computational Linguistics:
Technical Papers, page 1. Dublin City University
and Association for Computational Linguistics.

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Mohammad Sadegh Rasooli and Joel R. Tetreault.
2015. Yara parser: A fast and accurate dependency parser. Computing Research Repository,
arXiv:1503.06733. Version 2.

Preparing References:
Include your own bib file like this:\bibliographystyle{acl_natbib}\bibliography{acl2019}
where acl2019 corresponds to a acl2019.bib
file.

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A

Appendices

Appendices are material that can be read, and include lemmas, formulas, proofs, and tables thatare not critical to the reading and understandingof the paper. Appendices should be uploaded
as supplementary material when submitting thepaper for review. Upon acceptance, the appendices come after the references, as shown here.
Use \appendix before any appendix section toswitch the section numbering over to letters.

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Benjamin Borschinger and Mark Johnson. 2011. A
particle filter algorithm for Bayesian wordsegmentation. In Proceedings of the Australasian Language
Technology Association Workshop 2011, pages 10–
18, Canberra, Australia.

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American Psychological Association. 1983. Publications Manual. American Psychological Association,
Washington, DC.

References
Alfred V. Aho and Jeffrey D. Ullman. 1972. The
Theory of Parsing, Translation and Compiling, volume 1. Prentice-Hall, Englewood Cliffs, NJ.

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Supplemental Material

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Submissions may include non-readable supplementary material used in the work and describedin the paper. Any accompanying software and/or
data should include licenses and documentationof research review as appropriate. Supplementary material may report preprocessing decisions,model parameters, and other details necessary forthe replication of the experiments reported in thepaper. Seemingly small preprocessing decisions
can sometimes make a large difference in performance, so it is crucial to record such decisions toprecisely characterize state-of-the-art methods.
Nonetheless, supplementary material should be
supplementary (rather than central) to the paper. Submissions that misuse the supplementary material may be rejected without review.
Supplementary material may include explanations
or details of proofs or derivations that do not fit
into the paper, lists of features or feature templates, sample inputs and outputs for a system,
pseudo-code or source code, and data. (Sourcecode and data should be separate uploads, rather
than part of the paper).
The paper should not rely on the supplementarymaterial: while the paper may refer to and cite
the supplementary material and the supplementarymaterial will be available to the reviewers, they
will not be asked to review the supplementary material.

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7