What are the keywords in the following sentence? a aircraft moves out of position after receiving fuel from an aircraft during a mission over country .
aircraft, fuel, move, position

What are the keywords in the following sentence? north face caught my attention as the clouds started to come in
attention, catch, face

What are the keywords in the following sentence? lake in the middle of the mountains at sunrise
lake, mountain, sunrise

What are the keywords in the following sentence? the student and teacher are laughing in the classroom
laugh, student, teacher