What are the keywords in the following sentence? you spend a lot of time looking at these in unknown space .
look, space, spend, time

What are the keywords in the following sentence? Two ladies play the violin and the guitar on the street to entertain the passer byes.
entertain, guitar, street

What are the keywords in the following sentence? entrance with soldiers standing guard
entrance, guard, stand

What are the keywords in the following sentence? camping in fir forest with tent and campfire .
camp, forest, tent