Problem: How does the next paragraph end?

How to feed a pleco 
Keep driftwood in the tank at all times. 
Your pleco needs lots of fiber in their diet, and they can get it from driftwood. Make sure to provide several pieces of driftwood in the aquarium at all times so your pleco can suck and scrape it off.
A: The tiny pieces of driftwood the pleco eats help with its digestion. Rather than collecting driftwood yourself, choose real driftwood sold at fish or aquarium stores to ensure it is safe for your pleco.

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How to monkey vault 
Warm up. 
Spend at least 5-10 minutes stretching and warming up before doing parkour. Do everything, but focus on ankles, legs, knees, butt and shins.
A: Select a rail or wall to monkey vault over. You don't have to be able to jump over it, but pick an obstacle you can vault over normally with ease.

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How to treat a victim of electrical shock 
Look over the area of the incident carefully. 
Rushing in to save someone might be your first impulse, but if the danger of electrical shock remains you will only injure yourself as well. Take a moment to assess the scene and look for any obvious dangers.
A: Check for the source of the electrical shock. Look to see if the victim is still in contact with the source.

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A man is sitting on a bench playing a piano. a man
A:
comes up next to him and starts playing the piano with him.