PARADE: The annual Labour Day Parade march is happening today, obviously. The march, run by the Ontario Public Service Employees Union, celebrates union activists and workers. The march begins at the intersection of Queen Street and University Avenue and moves west until it finishes at the Ex. Best part? Participants get free CNE admission. It's almost worth it. Queen Street and University Avenue, 11 a.m., FREE. ART: It's the last day for curator Helena......