What are the keywords in the following sentence? students who clean in the classroom
classroom, clean, student

What are the keywords in the following sentence? a campaign has been launched to clean islands and the surrounding seas of all plastic .
campaign, island, plastic, sea, surround

What are the keywords in the following sentence? villa on the coast with private heated pool .
coast, pool, villa

What are the keywords in the following sentence? This bathroom has a painting on the wall behind a toilet
painting, toilet, wall