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A woman wearing jeans and a crewneck T-shirt walked around New York City for 10 hours, and a hidden camera recorded every step and every word spoken to her by the men she passed.

The video was posted on YouTube Tuesday by Hollaback, a non-profit devoted to ending street harassment in cities around the world.

In the video, actress Shoshana Roberts walks silently across diverse neighborhoods throughout the city, and is approached and harassed by complete strangers. At the end of the video, the filmmaker reveals that in the 10 hours of shooting, Roberts was subjected to more than 100 instances of verbal street harassment.

“This doesn’t include the countless winks, whistles, etc,” the filmmaker said.

Hollaback calls on women across the world to record incidents of street harassment and share them publicly to bring both awareness to the issue, but also to bring it to an end.

“We envision a world where street harassment is not tolerated and where we all enjoy equal access to public spaces,” says the organization on its website.