CREATE TABLE table_68790 ("Institution" TEXT, "Team" TEXT, "City" TEXT, "Province" TEXT, "First season" FLOAT, "Head coach" TEXT, "Enrollment" FLOAT, "Football stadium" TEXT, "Capacity" FLOAT)

What's the smallest season for Montreal that's greater than 5,100 for capacity?
SELECT MIN("First season") FROM table_68790 WHERE "City" = 'montreal' AND "Capacity" > '5,100'
SELECT MIN("First season") FROM "table_68790" WHERE "Capacity" > '5,100' AND "City" = 'montreal'