What are the keywords in the following sentence? Blue and black train pulling cars behind it under bridge.
bridge, car, pull, train

What are the keywords in the following sentence? my heart hurts so bad cause i am missing the love of my life
hurt, life, love

What are the keywords in the following sentence? lichen on heart shaped trunk of an old tree
heart, tree, trunk

What are the keywords in the following sentence? religious leader meets the president at his private library
leader, library, meet, president