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 abstract nouns in the sentence are:safetyconcern
The common nouns in the sentence are:safetypassengersconcernpilot
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 common nouns in the sentence are "safety," "passengers," "concern," "William J. Snow," "pilot," and "everyone." These nouns refer to general items or concepts rather than specific names or titles. "TWA" is a proper noun and does not belong in this list.
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