Complex sentence: The Young Women's Leadership School has a uniform policy middle school girls have to wear gray/navy pants, short or long sleeve polo shirt with TYWLS logo, navy vest or sweater with white with TYWLS emblem attached.
Split into simpler sentences: The Young Women's Leadership School has a uniform policy. Middle school girls wear gray/navy pants, short or long sleeve polo shirt with TYWLS logo, navy vest or sweater with white TYWLS emblem attached.