Article: Talk to your dentist about the products you're planning to use to whiten your teeth. They may be able to determine whether or they'll be effective for your particular discoloration or safe for use. If you have any small cracks in your teeth, your dentist may advise against using whitening products. The chemicals could irritate the tooth pulp if it's exposed. Whitening solutions can cause chemical burns on your gums which can make them appear white or cause them to be. This is usually harmless and clears up on its own, but you should still get it checked out to make sure there isn't heavy damage. In the meantime, stop using any products that caused this. The tissue should return to normal after a few days. A possible side effect of whitening your teeth is that they could become more sensitive. Some sensitivity is normal, but if your teeth become extremely sensitive to heat or cold, talk to your dentist to make sure your teeth aren't damaged. The dentist may advise you to stop using whitening products or suggest a different one. Follow their instructions. Some whitening products can cause pain and inflammation in your stomach if you swallow it. Mild discomfort can be a normal side effect, but if you experience severe pain or diarrhea or vomiting that lasts longer than 2 days, visit a doctor to make sure there isn't a serious problem. Stop using the product if you experience severe pain, vomiting, or diarrhea.
Question: What is a summary of what this article is about?
Check with your dentist before you whiten your teeth. Get medical care if your gums turn white or bleed. Talk to your dentist if your teeth become more sensitive. See a doctor if you experience severe stomach pain.

Problem: Article: Eventually, most kids stop using bikes with foot brakes and start using ones with hand brakes. Hand brakes give the rider a little more control by allowing them to choose which wheel to brake with. To use a hand brake, simply squeeze the metal bar in front of either hand grip. The back wheel brake usually slows the bike down more gradually, while the front brake slows the bike down more quickly be careful not to use the front brake too hard or you might go over the handle bars! Though every child learns at their own pace, in general, most kids are capable of learning to use hand brakes after about six years of age. Just like most kids eventually start using hand brakes, sooner or later, most kids eventually learn how to ride a bike with gears. Gears make it easy to go very fast, climb steep hills, and maintain a "cruising" speed without pedaling hard. To use gears, simply push the lever or switch near the hand grips in either direction. You should notice it suddenly get easier or harder to pedal the harder it is to pedal, the faster your pedaling will make you go. Again, every child learns at their own pace. Most kids from ages 9-12 are capable of using bikes with gears after a little basic training. Standing up while you pedal instead of using the seat lets you push on the pedals extra-hard, which makes this a great way to get up hills or gain speed very quickly. In addition, you have to be able to stand up on your bike to do lots of bike tricks (like the bunny hop below). You may find that it's tricky to balance at first or that your legs get tired quickly when you first try to stand up while pedaling. However, with a little practice, it's not hard to build up the strength and balance you need to master this skill. When you're comfortable biking on clear, even surfaces like streets, sidewalks, and fields, try biking on an off-road trail. You'll find that this is a little different than biking on a road it's usually slower, bumpier, and requires you to watch the path in front of you more. However, off-road biking can be a great way to exercise and see parts of the wilderness you haven't seen before, so give it a shot! When you feel confident riding your bike at any speed and in any location, try learning a few easy tricks! For example, you can try doing a bunny hop by working up to a slow speed, standing up, and pulling up on the handle bars as you push off of the ground and throw your weight upwards. In the air, lean forward to level out so that you hit the ground on both wheels. When you get good at this, you should be able to pull off a small "hop" which is great for getting you up curbs without stopping. Don't be discouraged if you fall or "wipe out" a few times when you're trying to learn the bunny hop and other tricks. Minor nicks and bruises are part of the process of learning you can't learn without making a few mistakes!
Summary: Try a bike with hand brakes. Try using a bike with gears. Try standing while you pedal. Try biking off-road. Try doing a bunny hop.

INPUT ARTICLE: Article: Use a spade or shovel to dig several holes that are 12 inches (30cm) deep between your garden rows. Dig as many holes as you can fill in with the compost you have on hand. Pour or shovel 2 US quarts (2,000ml) (1.9 L) of compost into each hole. You don't want to fill the entire hole with compost, as you'll add some of the existing garden soil to the hole as well. Using the soil you removed from the hole, cover the compost with soil until it is level with the rest of your garden bed. The nutrients from the compost will enrich the soil in your garden and help your plants thrive.

SUMMARY: Dig holes 12 inches (30cm) deep in your garden. Put 2 quarts (1.9 L) of compost in each hole. Fill in the rest of the hole with soil.

Sometimes it can be tricky to know if tickling will be viewed as cute and playful or annoying and inappropriate. Consider your location (if you are in public, he might not appreciate giggling madly in front of a bunch of people), and his current mood. If you've just been fighting or he's angry, now might not be a good time to poke and prod him. Listen to what he's saying. If he's confiding in you that he's heartbroken over his dog's death, he probably needs a hug more than he needs tickle torture. Wait until you're somewhere relatively private and have room to wrestle a little and not injure yourselves. Make sure he's not holding a hot beverage or something that might injure him or you when you catch him by surprise. Don't try to tickle him when he's playing video games or absorbed in something that is really important to him (even if you are annoyed that he's not paying attention to you). This is when tickling is just annoying, not fun. If you two are joking around and he's in a good mood, he probably won't mind a little tickle. Your tickle attack will fail if it turns out your boyfriend isn't even ticklish. Do a little exploring first to figure out where he's most ticklish. The most vulnerable spots on the body are also the most ticklish Poke him in his side, just above his hip or in his ribs and see if he giggles. Give him a hug and "accidentally" tickle his armpit. This is one of the more ticklish spots on most people. If he's laying down with his shoes off, gently run your toes along the bottom of his feet and notice his reaction. Kiss him gently on the neck and exhale through your nose so the air hits his ear. See if he gets goosebumps on his neck. Sharp nails might be good for tickling if you plan to just graze them over his skin (like on the underside of his feet or the back of his neck). But if you plan to really get into a tickle war, sharp nails may become painful.
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One-sentence summary --
Determine if it's the right time and place. Figure out if he's ticklish. Make sure your nails aren't too sharp.