Complex sentence: However, these groups have been largely sidelined by the Barisan Revolusi Nasional-Koordinasi (BRN-C), the group currently spearheading the insurgency which sees no reason for negotiations and is against talks with other insurgent groups.
Split into simpler sentences: However, these groups have been largely sidelined by the Barisan Revolusi Nasional-Koordinasi (BRN-C), the group currently spearheading the insurgency. It sees no reason for negotiations and is against talks with other insurgent groups.