Handle pseudo-parsing ungrammatical input

[mpacer]

Read Parsing Ungrammatical Input: An Evaluation Procedure to get an idea of how to understand the grammatical parsing of ungrammatical input.

This will be needed to handle ungrammatical sentences, sentences that are not well captured by the grammar parser, as well as for tests that actively introduce potentially ungrammatical replacements so as to ensure that the correct word is being used (see "there/their/they're").