The proper nouns in the sentence are:
The safety of the passengers in the concern of William J. Snow, the pilot, and everyone at TWA
saftey,passengers,concern,pilot
The common nouns in the sentence are:safetypassengersconcernpilot
The abstract nouns in the sentence are:safetyconcern
The concrete nouns in the sentence are:passengersWilliam J. Snowpilot
William J. Snow, TWA
william jj.snow.twa
william jj.snow.twa
william jj.snow.twa
The pronoun in the sentence is everyone, an indefinite pronoun, a word that takes the place of an unknown or unnamed number of people.
The common nouns in this sentence are'safetyconcernpassengerspilotWilliam J Snow = proper nounTWA = acronym and a proper nouneveryone = indefinite pronoun
saftey,passengers,concern,pilot