[CS241] more on PCFGs

[Matt Lease]

The first 2 sections of this paper also talk about markovization as well
many other issues we discussed.  It won the best paper award at one of
the top conferences this year.

http://acl.ldc.upenn.edu/N/N06/N06-1040.pdf

And since someone asked about learning a distribution over an infinite
set of trees, here's a theoretical paper from the same conference:

http://acl.ldc.upenn.edu/N/N06/N06-1043.pdf

Matt Lease wrote:
> Today's discussion of grammar markovization isn't in the book that I
> recall.  There is some discussion of it in Section 2 of the below paper
> if you are interested:
> 
> http://www.cs.berkeley.edu/~klein/papers/unlexicalized-parsing.pdf
> 
> if you google on grammar markovization, you'll also see various class
> slides from the author, Dan Klein, at Stanford and Berkeley.
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