what sororities are at duke university?
['Alpha Delta Pi - ΑΔΠ Ratings: 58. Grade: 73.84%', 'Alpha Kappa Alpha - ΑΚΑ Ratings: 3. Grade: 66.67%', 'Alpha Kappa Delta Phi - ΑΚΔΦ Ratings: 1. Grade: 47%', 'Alpha Phi - ΑΦ Ratings: 75. Grade: 69.92%', 'Chi Omega - ΧΩ Ratings: 57. ... ', 'Delta Delta Delta - ΔΔΔ Ratings: 44. ... ', 'Delta Gamma - ΔΓ Ratings: 56. ... ', 'Delta Sigma Theta - ΔΣΘ Ratings: 3.']