Removing "A" as a stop word

[mcgeestephen]

Trying to get the HPIDs for the query of "blood group" returns two ids when resolve_conflicts=False

from txt2hpo.extract import Extractor
extract=Extractor(resolve_conflicts=False,correct_spelling=False)
extract.hpo('blood group').hpids

['HP:0032370','HP:0032223']

These refer to the "Blood group A" and "Blood group" phenotypes, respectively. The model considers both phenotypes to be identical given that the term "A" is considered as a stop word.