Add the ability to extract reduced sentences

[abhisheknovoic]

The reduced sentence identification is shown to have important in linguistic analysis of Alzheimer's Disease. You can find it in the following two papers.

a. https://www.researchgate.net/profile/Karin_Ortiz/publication/45603092_Microlinguistic_aspects_of_the_oral_narrative_in_patients_with_Alzheimer's_disease/links/54cff6370cf24601c0960ae2/Microlinguistic-aspects-of-the-oral-narrative-in-patients-with-Alzheimers-disease.pdf

b. Predicting probable Alzheimer’s disease using linguistic deficits and biomarkers

An example of reduced sentence is

"Reduced sentences, which are quite similar to
reduced relative sentences in English grammar,
are spoken subordinated sentences that appear
abbreviated, lack a conjunction and have nominal
verb forms, either infinitive or gerund (Andre,´
1997). An example of a reduced sentence is “Here
is the boy asking his mother to keep the dog ...” (in
the original Brazilian Portuguese, “Aqui e o garoto ´
pedindo a sua m ` ae para ficar com o cachorro ˜ ...”).
Although they are called “reduced”, these sentences
are considered sophisticated because they demand
complex syntactic processing. Reduced sentences,
like unreduced relative sentences, are a type of two
connected clauses in which one occurs in the middle
of another. "

It would be great for BlaBla to support this feature.