[developers] Problems parsing with ERG

Mostafa Gomaa mostafa.gomaa89 at gmail.com
Sat May 18 23:54:02 CEST 2013

Dear Stephan,

Thanks a million for the reply, I was starting to go crazy on LKB. I will
try to do what you suggested, but for now the simplest fix for me is to
just use the online version of ERG. I wrote lisp code that sends the
sentence in an http post request and would parse the response to extract
the output, I just hope the html of the page doesn't change soon :). Thank
you again.


Mostafa Gomaa

On Sat, May 18, 2013 at 11:42 PM, Stephan Oepen <oe at ifi.uio.no> wrote:

> hi mostafa,
> the on-line demonstrator of the ERG is built around PET
> for parsing, where there are mechanisms for unknown
> word handling and parse ranking unavailable in the LKB.
> furthermore, the LKB by default does not apply packing
> during parsing and (on top of that) is about a factor of 5
> at least slower than PET.
> thus, markedly lower coverage could be owed to unknown
> words or resource exhaustion, or both.
> given the examples you suggest, maybe you can add the
> missing vocabulary to ‘lexicon.tdl’.  for packing and parse
> ranking, these can in principle be enabled.  please have a
> look in ‘parse.lsp’ and ‘active.lsp’; if you need help, i can
> refresh my memory of that code sometime next week …
> best, oe
> nb: there is a lisp API to PET, but there is no way it could
> be made to work on windoze easily, i fear.
> On Friday, May 17, 2013, Mostafa Gomaa <mostafa.gomaa89 at gmail.com> wrote:
> > Good day,
> > I am sorry if this has been asked before, but I am having some problems
> with LKB+ERG. I am using the latest version of both LKB and ERG, and there
> are a lot of sentences where LKB doesn't return any parses. I have played
> around with the online version of ERG and those sentences return parses.
> Any ideas on what to do about this?. Also I am primarily looking for a
> grammar with reasonable coverage of English, but doesn't have to be
> necessarily too large like the ERG. I basically want to be able to use
> sentences such as:
> > "fido is a dog"
> > "all dogs bark"
> > "what does fido do?"
> > "does fido bark?"
> > "is fido a dog?".
> > If anyone already knows from where I can obtain such a grammar or how to
> fix the issue with the ERG, I would be extremely grateful. Also, as a
> suggestion, I think it would be a very good idea to make an API for the
> online version of ERG, I think it would be extremely useful and much easier
> to use. Thank you all in advance.
> > Regards,
> > Mostafa Gomaa
> >
> >
> --
> +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> +++ Universitetet i Oslo (IFI); Boks 1080 Blindern; 0316 Oslo; (+47) 2284
> 0125
> +++    --- oe at ifi.uio.no; stephan at oepen.net; http://www.emmtee.net/oe/ ---
> +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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