What are the keywords in the following sentence? stairs on building that lead nowhere
build, lead, stair

What are the keywords in the following sentence? politician says the city should focus .
city, politician, say

What are the keywords in the following sentence? cloud moving fast time lapse with a view of lake and mountain
cloud, mountain, move, view

What are the keywords in the following sentence? hiker and dog crossing wooden bridge on the cloudy day
bridge, cross, dog