story: My mom had a 75 gallon fish tank. She had friendly freshwater fish in there. Every one of her birthdays, I bought her shark for her tank. I tried to turn her sweet tank into a shark tank. To my shagrin, all the shark died and were eaten by the sweet fish.
 selected sentence: I tried to turn her sweet tank into a shark tank.
I want(s) to turn her sweet tank into a shark tank >Motivates> I try to turn her sweet tank into a shark tank