What are the keywords in the following sentence? airplane taking off on a runway
airplane, runway, take

What are the keywords in the following sentence? people make a shape of digits with firework to welcome the new year .
firework, welcome, year

What are the keywords in the following sentence? which type of organism can obtain energy directly from any of the other organisms in an ecosystem .
ecosystem, energy, obtain, organism

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