Besides the top award, winners will be selected by the judges in categories like Narrative, Documentary and Animation, as well less traditional categories like Experimental and Remix.

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Looking at films shown at the Sundance Film Festival over the past decade - and accounting for 820 narrative and documentary films - researchers found women represented 29.8% of some 11, 000 filmmakers.

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There are more women working in documentary films than narrative films, but study director Stacy Smith said her research found that "as commerce moves in, females move out".

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As much as it is documentary, it had a narrative arc.

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Coach, which was executive-produced by Whoopi Goldberg, took the best short documentary prize while Italy's The Nightshift Belongs to the Stars won best narrative.

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Though this narrative feature film project will mark something of a departure for Broomfield, fans of his documentary work can rest assured that he will continue to make his famously chaotic documentaries: he is reportedly close to completing a documentary about Sarah Palin.

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