NLP

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NLP
Shadab Shaikh (208ce70)
Ankit Thakur (208ce72)
Vishwanath Acharya (208ce62)
Gaurav Date (208ce63)
Harichandran Nadar (208ce67)
What is NLP?
Natural Language Processing (NLP)
Computers use (analyze, understand, generate) natural language
Brief History of NLP
1940s 1950s: Foundations
Development of formal language theory.
Probabilities and information theory.
1957 1970s:
Use of formal grammars as basis for NLP.
Use of logic, logic based programming.
1970s 1983:
Probabilistic methods for early speech recognition.
Discourse modeling.
1983 1993: Finite state models (morphology).
1994 1999: Strong integration of different techniques, different areas.
2000-2007: The Rise of Machine Learning, treebank, annotated corpus.
Renewed interest in unsupervised statistical approaches
HISTORY
Machine translation (MT)
Chomsky published Syntactic Structures
Speech recognition
ALPAC (Automatic Language Processing Advisory Committee )
Transformational model of linguistic competence.
Augmented Transition Networks ( Woods)
Concrete problems

The sentence "I never said she stole my money", this sentence could have several distinct meanings:

"I never said she stole my money" - Someone else said it, but I didn't.
"I never said she stole my money" - I simply didn't ever say it.
"I never said she stole my money" - I might have implied it in some way, but I never explicitly said it.
"I never said she stole my money" - I said someone took it; I didn't say it was she.
"I never said she stole my money" - I just said she probably borrowed it.
"I never said she stole my money" - I said she stole someone else's money.
"I never said she stole my money" - I said she stole something of mine, but not my money.