What are the keywords in the following sentence? As someone throws a punch, someone blocks him.
block, punch, throw

What are the keywords in the following sentence? a desk with a laptop with a web page up
desk, laptop, page

What are the keywords in the following sentence? Someone looks for the syringe but can not find it.
find, look, syringe

What are the keywords in the following sentence? astronaut became the first woman to make a spacewalk when she floated outside the space shuttle .
astronaut, float, shuttle