context: How to text 911
Check with your local 9-1-1 center to see if texting is available in your area.
Texting to 9-1-1 is a relatively new technology. In most areas, you are unable to text to 9-1-1 and must call.
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next sentence for the context: You can call your local police department/9-1-1 center using the ten-digit non-emergency number to see if you can text 9-1-1 in your area. You can find the number for your local 9-1-1 center in the yellow pagers or online.

context: How to detangle cat fur
Keep your cat calm.
Removing matted fur can be a time-consuming and potentially painful process, and many cats will not respond well to it. It is essential that your cat starts out calm (such as after a hearty meal) and remains so as you remove the knots and tangles.
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next sentence for the context: It is better to halt the process and resume at another time than to force a scared or angry cat to submit to the removal of tangles. If you have regularly groomed your cat from an early age, it is more likely to accept the tangle-removal process.

context: How to choose your glasses frames
Think about how often you wear glasses.
This has an effect on several aspects of your new frames. People who wear glasses less often probably want to spend less money.
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next sentence for the context: They may also be okay with heavier frames. Those who wear glasses regularly may want to spend more money on a more durable pair.

context: A crowd in the background watches gymnasts performing. a gymnast
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next sentence for the context:
runs across a floor, performing cartwheels and flips.