Natural Language Processing: Python and NLTK

The two approaches in parsing

There are mainly two views/approaches used to deal with parsing, which are as follows:

The rule-based approach	The probabilistic approach
This approach is based on rules/grammar	In this approach, you learn rules/grammar by using probabilistic models
Manual grammatical rules are coded down in CFG, and so on, in this approach	This uses observed probabilities of linguistic features
This has a top-down approach	This has a bottom-up approach
This approach includes CFG and Regex- based parser	This approach includes PCFG and the Stanford parser