'A tale of two skirts'
Restrictions over appropriate skirt length have caused controversy in two countries recently and trended big online - but for entirely opposing reasons.
In Algeria, a young woman was turned away from a university exam because her skirt was too short. But a few weeks before in France, school authorities sent a Muslim teenager home because of her long black skirt.
The two stories are very different. But by contrasting them, as Mai Noman of BBC Trending does in this video, can we learn anything about why hemlines are so controversial in online debate?
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