What are the keywords in the following sentence? He says nothing, keeps control of himself.
keep, nothing, say

What are the keywords in the following sentence? flight above the clouds during sunrise
cloud, flight, sunrise

What are the keywords in the following sentence? a rugged mountainous canyon conceals a still active monastery which seems to somehow cling to the sheer cliffs .
cliff, cling, monastery

What are the keywords in the following sentence? scientist working in a hospital medical laboratory conducting experiments
experiment, laboratory, work