I don't know if it fits in the purpose of this library but sometimes could be useful to get singular or plural information in every entity found. I think this could be accomplished reusing TenseInflector or NounInflector functionality in Natural dependency. It could be useful to add custom cases for irregular (mouse / mice)

Describe the solution you'd like

The resulting entity should have something like this:

{
	"start": 0,
	"end": 0,
	"len": 1,
	"accuracy": 0.95,
	"sourceText": "cars",
	"utteranceText": "cars",
	"entity": "vehicle",
	"resolution": {
		"strValue": "car",
		"value": "car",
		"subtype": "whatever",
		"number": "singular" | "plural" | "ambiguous"
	}
}

This would require modifications in addNamedEntityText method...