Instruction: Analyze a question and its supporting document. Predicting answerability based on the information provided in the document. Output yes if the document contains relevant information to answer the question, otherwise output no.

Input:
Question: How to position stakes in sand and attach to sunbrella
Document: I used a mallet to pound the lower half of the pole into the wet sand which anchors it better than you trying to push it into the sand. On a no wind day the stakes aren't necessary, but any breeze over 3-5 mph and you MUST anchor this umbrella with the included stakes/tethers. The stakes are good quality metal vs. cheap plastic which seem to come with most other tents/shades.
I was nervous using this with my 7 month old at first but it worked out great. Normal beach winds and the stakes kept it in the sand just fine. It takes less than 2 minutes putting it together. Light weight and easy to carry to the beach. There was plenty of room for the little one to crawl around under it and could probably sit two adults. Very pleased with this purchase.
The pole seems to be a pretty cheap quality.Other than the pole, the umbrella is great. It's big, easy to set up, easy to take down, easy to store, and easy to carry. The stakes they provide aren't going to grab into sand, but that's easy to get around by drilling a hole into a flat piece of metal and running a cord through it. Tie the cord to the top loops and bury the metal in the sand. Then fill the hole in with wet sand.
the pole seems a bit weak and kept me worried it was going to break during some strong winds while at the beach. I had to use the additional tie straps to help keep it steady when it was in the up right position.
The steaks provided are not enough to keep it on the ground at the beach/sand.
We Use this at the beach and we love it. Stays in place in the sand and provides great shade
This umbrella looks great and is easy to assemble but ours arrived with one part jammed. This makes it impossible to anchor it in the sand, and on a windy day at the beach, this was a real problem. We'll return it.
I saw this umbrella in the beach and thought it was the solution to my beach problems...but it turns out to be complicated to set up and the stick is very long and thin. You need to attached it in the sand and it's just really no fun to use!
It held up very well in sudden winds on the beach which was the main reason we bought it. After we bought 4 regular umbrella's which all broke. It is a breeze to set up and kept our coolers  (and us) in the shade and clear of sand.
It wasn't long before the wind blew over the umbrella AND the cooler, causing quite a bit of sand to get in my son's eyes and face. I'm extremely disappointed with this purchase as I was hoping to use this on future beach trips; however, I will not even bother. This is definitely not worth the $50!!! !
Answer: yes