We can summarize this paper in the answers to three  What are case studies?
We can shorten it to "What are case studies?"
It's difficult to summarize this paper.
Two kids are brushing their teeth with red toothbrushes.
LSC recipients are developing plans to show people how to spend more.
A dog is running.
A seal performs in front of a crowd.
The bay has a promontory towards the south west.
Someone is watching a group of people on the ground.