As part of our coverage around One Billion Rising we want you to help us build a global picture of violence against women. Is it something you’ve experienced? Either as a woman, or a man. Or do you know someone who has? Why do you think it happens? What do you think are the underlying causes of violence against women, globally or in your community?What about the solutions. Have you been involved in a campaign or initiative to prevent violence against women? Tell us why it works. Do you have an idea for a campaign you’d like to get off the ground? Will you take part in One Billion Rising?We recognise these stories might sensitive so if you’d like to submit something anonymously, we suggest setting up an account with a username that is different from your own, and make sure you turn your location data off. If you have any problems with your submission, or you'd like to discuss your submission before posting, please get in touch [email protected]/* */Share your stories by text, photo or video through the “contribute to this article” buttons. If you have a smartphone, you can also download the GuardianWitness app. This assignment closes at 1pm on Saturday 15 February.GuardianWitness is the home of user-generated content on the Guardian. Contribute your video, pictures and stories, and browse news, reviews and creations submitted by others. Posts will be published on GuardianWitness, and the best pieces featured on the Guardian website.(theguardian.com)ANN.Az