What are the keywords in the following sentence? the quaint cobbled streets of a town .
quaint, street, town

What are the keywords in the following sentence? A woman talking to an infant, and then placing an oxygen mask over the baby's face.
face, mask, talk

What are the keywords in the following sentence? progress of construction in the running tunnel looking east towards a city
construction, look, tunnel

What are the keywords in the following sentence? balloon floats over the streets during event
balloon, event, float, street