Complex sentence: Prystanski endorsed the mayoral candidacy of Peter Kaufmann in the 1995 municipal election, who finished a surprisingly strong second against incumbent Susan Thompson, while Prystanski was easily re-elected in his own ward.
Split into simpler sentences: Prystanski endorsed the mayoral candidacy of Peter Kaufmann in the 1995 municipal election. Kaufmann who finished a surprisingly strong second against incumbent Susan Thompson, while Prystanski was easily re-elected in his own ward.