CREATE TABLE table_50890 ("Institution" TEXT, "Location" TEXT, "Founded" FLOAT, "Affiliation" TEXT, "Enrollment" FLOAT, "Nickname" TEXT)

What is Affiliation, when Nickname is Bulldogs?
SELECT "Affiliation" FROM table_50890 WHERE "Nickname" = 'bulldogs'
SELECT "Affiliation" FROM "table_50890" WHERE "Nickname" = 'bulldogs'