Factbox-What's at stake in Armenia's election on Sunday?

By Lucy PapachristouYEREVAN, June 5 (Reuters) - Armenia holds a parliamentary election on Sunday that pits the governing Civil Contract party, which is pursuing closer ties with the West, against an array of opposition parties, many of which are pro-Russian.Opinion polls predict Civil Contract, led by Prime Minister Nikol Pashinyan, will emerge as the largest party, but it could fall short of the two-thirds majority necessary to make changes to the constitution.Here's what to look out for:REFERENDUM ON PEACE DEAL