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: Does the electrical cord have 3-prongs?  I need to plug it into a power strip, and it won't work it if only has 2 prongs.
Document: This is my second lamp and is a very handy item to have near my work area and workbench. As I age I need more focused light on my work and this fits the bill.
Some reviewers say it doesn't work as a headboard lamp due to sagging. We've been using this a few months now and have it clamped onto the headboard of a bunk bed, gets moved from top to bottom bunk regularly. It does sag a bit, as has every gooseneck lamp we've ever owned, but not so much as to make it unusable. We are able to position it in a very workable position whenever we need to use it.The clamp is quite strong yet doesn't scratch the headboard.
The clip isn't padded but it doesn't bother me. The shape of the lamp projects light well. I'm surprised at how sturdy the flexible part is. I have 2 and wouldn't trade them.
These lights work fine. I wished they were cooler when they were kept on for more than 20 mins but they are fine.
The hood on this was a little bigger than I wanted. It is 6 x 4.5 inches. Also, the clamp doesn't really work on anything over 1 inch thick. Other than that, it seems to be a good lamp
The lamp is great. Its big enough for what I need. Happy i got it and easy to turn off and on
Nice little lamp for the money. I truly wonder what people expect for less than $20. Is the lamp indestructible? No...of course not. Does it work as it claims to? Yes! The gooseneck is not impervious to gravity and wll not hold the weight of the lamp at a 45 degree angle indefinitely, however as a "desk lamp" it lights up my desk!
I needed a flexible lamp like this for my desk to do homework. I love that it's not bulky and it's a simple design. Very flexible, with the on switch (turn style) on the top for easy access (i was grateful it wasn't part of the cable cord... those are annoying!). Excellent price as well.
On the plus side, the light does work and it doesn't cost much. However, the gooseneck needs a lot of Viagra. It just hangs down limply - not at all like the picture. I wanted to use it on a bedstead, but it just sagged straight down. You couldn't use it as a desk lamp either. I don't know what anyone could use this for; maybe have it hang down from above? But at least this worthless piece of junk didn't cost a  lot.
I needed a good lamp for my music stand and this one fit the bill. It works well, doesn't need specialized bulbs and provides the lighting I need.
Answer: no