Generate a topic word for the given sentence. A topic word is usually the name of a person, place, animal, concept or object the sentence is focusing on.

the southern connecticut state university is one of four universities in the u.s. state of connecticut.
southern connecticut state university

nelsan ellis (november 30, 1977 july 8, 2017) was an american actor and playwright.
nelsan ellis

the boeing e-3 sentry is a military aircraft.
boeing e-3 sentry