What are the keywords in the following sentence? monotone texture in cold colors of the wood
color, texture, wood

What are the keywords in the following sentence? portrait of a senior woman suffering from headache
headache, portrait, suffer

What are the keywords in the following sentence? A passenger plane that is pulled into a terminal.
plane, pull, terminal

What are the keywords in the following sentence? students of degree visiting the historical city
city, student, visit