coded as party because candidates were excluded from their parties
"Independents of Hope: candidates led by Nkurunziza’s two main opponents - Agathon Rwasa, formerly FNL leader, and Charles Nditije, formerly UPRONA head, who were ousted from their parties but remain powerful challengers to the president." - https://mg.co.za/article/2015-06-25-burundi-elections-key-facts-in-tense-polls
