what fraternities are at yale?
['Alpha Delta Phi - ΑΔΦ Ratings: 47. Grade: 67.51%', 'Alpha Epsilon Pi - ΑΕΠ Ratings: 44. Grade: 64.95%', 'Alpha Phi Alpha - ΑΦΑ Ratings: 14. Grade: 67%', 'Alpha Phi Delta - ΑΦΔ Grade: 38.67%', 'Beta Theta Pi - ΒΘΠ Ratings: 15. Grade: 55.2%', 'Beta Upsilon Chi - ΒΥΧ Ratings: 5. ... ', 'Chi Psi - ΧΨ Ratings: 61. ... ', 'Delta Kappa Epsilon - ΔΚΕ Ratings: 59.']