What are the keywords in the following sentence? history of an organism and its relationship to other species .
organism, relationship, specie

What are the keywords in the following sentence? The shower curtain in this bathroom is hanging on the outside of the bathtub.
bathtub, curtain, hang

What are the keywords in the following sentence? The pastries are being served with cups of coffee.
coffee, pastry, serve

What are the keywords in the following sentence? poetry book on an altar of a catholic church
altar, book, church