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chapter 4 tasks further explained

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Arianna Masciolini
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@@ -85,29 +85,24 @@ You will need Haskell and GF libraries to build gfud, and LaTeX to show the pdf.
## Chapter 4: phrase structure analysis ## Chapter 4: phrase structure analysis
1. Construct phrase structure trees for some of the sentences in the corpus used in Chapter 3, both for English and your chosen language. ### Prerequisites: get `gf-ud` to work
There are multiple ways to use `gf-ud`:
- using the version that is installed on eduserv
- installing a pre-compiled executable, available for Mac and Ubuntu machines at http://www.grammaticalframework.org/~aarne/software/
- compiling the source code, available at https://github.com/GrammaticalFramework/gf-ud. `gf-ud` can be built:
- with `make` provided that you have the GHC Haskell compiler and the gf-core libraries (available at https://github.com/GrammaticalFramework/gf-core) installed
- with the Haskell Stack tool, by running `stack install`. This will install all the necessary dependency automatically.
2. Test the grammar ### Tasks
1. Construct (by hand) phrase structure trees for some of the sentences in the corpus used in Chapter 3, both for English and your chosen language.
2. Test the grammar at
https://github.com/GrammaticalFramework/gf-ud/blob/master/grammars/English.dbnf https://github.com/GrammaticalFramework/gf-ud/blob/master/grammars/English.dbnf
on last week's corpus, both for English and your own language. on last week's corpus, both for English and your own language.
In practice, this means:
- running `gf-ud`'s `dbnf` command on (possibly POS-tagged) versions of the sentences in Chapter 3's corpus.
- comparing the CoNNL-U and parse trees obtained in this way with, respectively, your hand-drawn parse trees and the CoNNL-U trees from Chapter 3. Parse tree comparison can be qualitative, while CoNNL-U trees are to be compared quantitatively via `gf-ud eval`.
3. Modify the grammar to suit your language and test it on some of the UD treebanks by using `gf-ud eval`. 3. Modify the grammar to suit your language and test it on some of the UD treebanks by using `gf-ud eval`. Try to obtain a `udScore` above 0.60. You are welcome to explain the changes you make.
The gf-ud program can be found in executable versions (once gunzipped) in
http://www.grammaticalframework.org/~aarne/software/
The source code of gf-ud can be found in
https://github.com/GrammaticalFramework/gf-ud
It can be built with `make` if you have Haskell and also have built the gf-core libraries:
https://github.com/GrammaticalFramework/gf-core
This will not be needed if you can use one of the ready-made libraries.