What are the keywords in the following sentence? an overgrown gate leads to an old castle
castle, gate, lead

What are the keywords in the following sentence? identifying numbers page the atoms of different elements contain different numbers of protons .
atom, contain, element, number, proton

What are the keywords in the following sentence? woman reaching for jar on the shelf in the supermarket
reach, shelf, supermarket

What are the keywords in the following sentence? the star is known for his experimental hair
hair, know, star