nqpz / predicateparser

A natural language parser system

predicateparser

Silly natural language parser into predicates using types and a stack.

Example

Input: my famous neighbor who lives on a boat

Classic AUG (Applicative Universal Grammar):

• my (famous (who neighbor (on (a boat) lives)))
• my (who (famous neighbor) (on (a boat) lives))
• who (my (famous neighbor)) (on (a boat) lives)

Problem: Multiple correct parses + we want to have predicates instead, like so:

• "Neighbor" predicates:
  • my
  • famous
  • on(boat)(lives)
• "Boat" predicates:
  • a

Ignoring the "who" connector word for the moment.

Limitations

Most.

Building and running

Run stack install to install. See https://docs.haskellstack.org/en/stable/install_and_upgrade/.

echo 'my famous neighbor lives on a boat' | predicateparser
echo 'my door [lives in a house] on the boat' | predicateparser

The raw sentence "my door lives in a house on the boat" technically has multiple interpretations, at least these two:

1. my door lives in a [house on the boat]
2. my door [lives in a house] on the boat

The nuances differ slightly depending on your focus. We force the second interpretation by using square brackets, though technically the system doesn't actually support the first interpretation due to some current technical limitations. However, it also won't work without specifying the brackets, due to some other current limitations.

Misc. notes / TODO

Focus on prepositions: in, from, ...

Adjectives stack.

Relations on noun objects as end result.

Need to build up dictionary.