What are the keywords in the following sentence? fossils have been found of organisms that no longer live .
fossil, live, organism

What are the keywords in the following sentence? perspective from the air of interstate bridge spanning across canal
bridge, canal, span

What are the keywords in the following sentence? working tug boat guiding a large container ship through the narrow entrance of harbour
boat, entrance, guide, harbour, ship

What are the keywords in the following sentence? there are tons of ways you lose energy in your home .
energy, home, way