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