What are the keywords in the following sentence? firefighters discuss tactics whilst taking part in a simulated chemical incident
discuss, incident, part, simulate, tactic

What are the keywords in the following sentence? competition the struggle between organisms to survive in a habitat with limited resources .
habitat, organism, survive

What are the keywords in the following sentence? Several airplanes are sitting at gates of an airport.
airplane, airport, gate, sit

What are the keywords in the following sentence? the players brought a smile to sick children and their families during what must be a difficult time
family, smile, time