hashtags are not considered as Named Entities

[monajalal]

I assume mentions should be considered as named entities
@realDonaldTrump/O Thank/O you/O for/O saying/O you/O won't/O use/O vulger/O language/O anymore/O ./O Talk/O about/O Sanders/B-ENTITY &/O Clinton/B-ENTITY ./O Take/O Cruz/O as/O VP/O ./O Mexican/O votes/O !!!/O

but as you see in the results mentions are considered Others. Is there a way to change that within your code?
Additionally, do you know why in the above example Cruz is not considered a named entity?