CREATE TABLE school_details (school_id DECIMAL, nickname TEXT, colors TEXT, league TEXT, class TEXT, division TEXT)
CREATE TABLE school_performance (school_id DECIMAL, school_year TEXT, class_a TEXT, class_aa TEXT)
CREATE TABLE school (school_id DECIMAL, school TEXT, location TEXT, enrollment DECIMAL, founded DECIMAL, denomination TEXT, boys_or_girls TEXT, day_or_boarding TEXT, year_entered_competition DECIMAL, school_colors TEXT)
CREATE TABLE player (player_id DECIMAL, player TEXT, team TEXT, age DECIMAL, position TEXT, school_id DECIMAL)

Show the denomination shared by schools founded before 1890 and schools founded after 1900
SELECT denomination FROM school WHERE founded < 1890 INTERSECT SELECT denomination FROM school WHERE founded > 1900
SELECT "denomination" FROM "school" WHERE "founded" < 1890 INTERSECT SELECT "denomination" FROM "school" WHERE "founded" > 1900