Çiğdem Mater, a Turkish film producer and journalist, has been sentenced to 18 years in prison on charges of aiding an attempt to overthrow the Turkish government through the Gezi Park anti-government protests in 2013.

In addition to Mater and  the Turkish court also sentenced five other defendants to 18 years in jail each and Osman Kavala, a Turkish businessman and a human rights activist, to life in prison over similar charges.

The protests in 2013 erupted over government plans to demolish Gezi Park in Taksim. They quickly turned into mass anti-government demonstrations that were violently suppressed by the government, leading to the death of 11 protestors due to the use of disproportionate force by the police.

Mater was arrested on Monday and sent to Istanbul’s Bakirkoy women’s prison later the same day.