Global Inference and Learning
Towards Natural Language Understanding
Dan Roth
Department of Computer Science
University of Illinois at Urbana-Champaign
AAAI-06 Invited Talk
Nice to Meet You
Learning and Inference
Global decisions in which several local decisions play a role but there are mutual dependencies on their outcome.
(Learned) classifiers for different sub-problems
Incorporate classifiers' information, along with constraints, in making coherent decisions – decisions that respect the local classifiers as well as domain & context specific constraints.
Global inference for the best assignment to all variables of interest.
Comprehension
(ENGLAND, June, 1989) - Christopher Robin is alive and well. He lives in England. He is the same person that you read about in the book, Winnie the Pooh. As a boy, Chris lived in a pretty home called Cotchfield Farm. When Chris was three years old, his father wrote a poem about him. The poem was printed in a magazine for others to read. Mr. Robin then wrote a book. He made up a fairy tale land where Chris lived. His friends were animals. There was a bear called Winnie the Pooh. There was also an owl and a young pig, called a piglet. All the animals were stuffed toys that Chris owned. Mr. Robin made them come to life with his words. The places in the story were all near Cotchfield Farm. Winnie the Pooh was written in 1925. Children still love to read about Christopher Robin and his animal friends. Most people don't know he is a real person who is grown now. He has written two books of his own. They tell what it is like to be famous.
1. Christopher Robin was born in England. 2. Winnie the Pooh is a title of a book.
3. Christopher Robin's dad was a magician. 4. Christopher Robin must be at least 65 now.
A process that maintains and updates a collection of propositions about the state of affairs.
How to Address Comprehension (cartoon)

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