Original sentence: The 2019 Papua protests refers to a series of protests by Papuans that began on 19 August 2019, mainly across Indonesian Papua.The protests erupted in response to an incident in Surabaya where a group of Papuan students were arrested for alleged disrespect of the Indonesian flag
Edited sentence: The 2019 Papua protests refers to a series of protests by Papuans since 19 August 2019, mainly across Indonesian Papua.The protests erupted in response to an incident in Surabaya where a group of Papuan students were arrested for alleged disrespect of the Indonesian flag and experienced racism throughout their arrest