context: How to stretch for volleyball
Stick to dynamic stretching.
Dynamic stretching involves active movement, warming up your muscles for exercise. Avoid static stretches (holding a stretch) before exercise, as this does not prepare your body and may even decrease athletic performance.
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next sentence for the context: The rest of this section describes various dynamic stretches that are useful for volleyball players. You may go through all of them, or pick and choose the ones that seem to help most.

context: How to get a bladder scan
Get a physical exam beforehand.
As soon as you develop bladder symptoms or medical concerns, make an appointment with your doctor. They will likely give you a general exam and discuss your medical history, including any urinary tract problems.
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next sentence for the context: Be detailed with your answers and talk about other diagnostic options, such as blood work, that can be done prior to a scan. An ultrasound bladder scan is especially useful when diagnosing patients suffering from enlarged prostates, spinal cord injuries, and other medical concerns.

context: How to write a sonnet like shakespeare
Include 14 lines of equal length.
The sonnet is known for its length : 14 lines exactly. There are many varieties of the sonnet form, but shakespearean sonnets are always 14 lines.
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next sentence for the context: The quatrain is a poetic term for 4 lines of poetry that share a common sensibility, and usually share a rhyme scheme. The couplet is a poetic term for 2 lines of rhyming verse.

context: How to clean cultured marble
Dampen a clean rag with white vinegar.
Your rag should be wet through with white vinegar, but excess vinegar should not drip or seep from the rag. Either pour vinegar onto your rag in a sink or dunk your rag in vinegar in a bucket.
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next sentence for the context:
Wring out the rag lightly over a sink. Too much white vinegar can cause this liquid to spread to areas of the marble that are already clean.