What are the keywords in the following sentence? A cable train with passengers sit on it tracks.
passenger, sit, train

What are the keywords in the following sentence? military commanders salute troops during parades at the celebrations
commander, salute, troop

What are the keywords in the following sentence? a passenger aircraft is taking off runway of international airport into the evening
evening, runway, take

What are the keywords in the following sentence? write an equation of a line from a graph
equation, graph, line, write